diff --git a/vendor-log b/vendor-log
index 7593ef1..d484b89 100644
--- a/vendor-log
+++ b/vendor-log
@@ -134,3 +134,5 @@ da118f7b8e5954f39d0d2130ab35d4bf0e3cb344	golang.org/x/net/context
 737072b4e32b7a5018b4a7125da8d12de90e8045	github.com/mattn/go-runewidth
 44e365d423f4f06769182abfeeae2b91be9d529b	github.com/olekukonko/tablewriter
 4e1c5567d7c2dd59fa4c7c83d34c2f3528b025d6	github.com/oxtoacart/bpool
+a3b3ca73af22dd09dfac218f586a8f42c681298d	github.com/Xe/ln
+c605e284fe17294bda444b34710735b29d1a9d90	github.com/pkg/errors
diff --git a/vendor/github.com/Xe/ln/doc.go b/vendor/github.com/Xe/ln/doc.go
new file mode 100644
index 0000000..ab81c3c
--- /dev/null
+++ b/vendor/github.com/Xe/ln/doc.go
@@ -0,0 +1,25 @@
+/*
+Package ln is the Natural Logger for Go
+
+`ln` provides a simple interface to logging, and metrics, and
+obviates the need to utilize purpose built metrics packages, like
+`go-metrics` for simple use cases.
+
+The design of `ln` centers around the idea of key-value pairs, which
+can be interpreted on the fly, but "Filters" to do things such as
+aggregated metrics, and report said metrics to, say Librato, or
+statsd.
+
+"Filters" are like WSGI, or Rack Middleware. They are run "top down"
+and can abort an emitted log's output at any time, or continue to let
+it through the chain. However, the interface is slightly different
+than that. Rather than encapsulating the chain with partial function
+application, we utilize a simpler method, namely, each plugin defines
+an `Apply` function, which takes as an argument the log event, and
+performs the work of the plugin, only if the Plugin "Applies" to this
+log event.
+
+If `Apply` returns `false`, the iteration through the rest of the
+filters is aborted, and the log is dropped from further processing.
+*/
+package ln
diff --git a/vendor/github.com/Xe/ln/logger.go b/vendor/github.com/Xe/ln/logger.go
index cdfe89e..47d8b5d 100644
--- a/vendor/github.com/Xe/ln/logger.go
+++ b/vendor/github.com/Xe/ln/logger.go
@@ -1,7 +1,6 @@
 package ln
 
 import (
-	"fmt"
 	"os"
 	"time"
 
@@ -30,14 +29,28 @@ func init() {
 	DefaultLogger = &Logger{
 		Filters: defaultFilters,
 	}
-
 }
 
 // F is a key-value mapping for structured data.
 type F map[string]interface{}
 
+// Extend concatentates one F with one or many Fer instances.
+func (f F) Extend(other ...Fer) {
+	for _, ff := range other {
+		for k, v := range ff.F() {
+			f[k] = v
+		}
+	}
+}
+
+// F makes F an Fer
+func (f F) F() F {
+	return f
+}
+
+// Fer allows any type to add fields to the structured logging key->value pairs.
 type Fer interface {
-	F() map[string]interface{}
+	F() F
 }
 
 // Event represents an event
@@ -48,8 +61,7 @@ type Event struct {
 }
 
 // Log is the generic logging method.
-func (l *Logger) Log(xs ...interface{}) {
-	var bits []interface{}
+func (l *Logger) Log(xs ...Fer) {
 	event := Event{Time: time.Now()}
 
 	addF := func(bf F) {
@@ -62,19 +74,10 @@ func (l *Logger) Log(xs ...interface{}) {
 		}
 	}
 
-	// Assemble the event
-	for _, b := range xs {
-		if bf, ok := b.(F); ok {
-			addF(bf)
-		} else if fer, ok := b.(Fer); ok {
-			addF(F(fer.F()))
-		} else {
-			bits = append(bits, b)
-		}
+	for _, f := range xs {
+		addF(f.F())
 	}
 
-	event.Message = fmt.Sprint(bits...)
-
 	if os.Getenv("LN_DEBUG_ALL_EVENTS") == "1" {
 		frame := callersFrame()
 		if event.Data == nil {
@@ -97,7 +100,7 @@ func (l *Logger) filter(e Event) {
 }
 
 // Error logs an error and information about the context of said error.
-func (l *Logger) Error(err error, xs ...interface{}) {
+func (l *Logger) Error(err error, xs ...Fer) {
 	data := F{}
 	frame := callersFrame()
 
@@ -117,7 +120,32 @@ func (l *Logger) Error(err error, xs ...interface{}) {
 }
 
 // Fatal logs this set of values, then exits with status code 1.
-func (l *Logger) Fatal(xs ...interface{}) {
+func (l *Logger) Fatal(xs ...Fer) {
+	xs = append(xs, F{"fatal": true})
+
+	l.Log(xs...)
+
+	os.Exit(1)
+}
+
+// FatalErr combines Fatal and Error.
+func (l *Logger) FatalErr(err error, xs ...Fer) {
+	xs = append(xs, F{"fatal": true})
+
+	data := F{}
+	frame := callersFrame()
+
+	data["_lineno"] = frame.lineno
+	data["_function"] = frame.function
+	data["_filename"] = frame.filename
+	data["err"] = err
+
+	cause := errors.Cause(err)
+	if cause != nil {
+		data["cause"] = cause.Error()
+	}
+
+	xs = append(xs, data)
 	l.Log(xs...)
 
 	os.Exit(1)
@@ -126,16 +154,21 @@ func (l *Logger) Fatal(xs ...interface{}) {
 // Default Implementation
 
 // Log is the generic logging method.
-func Log(xs ...interface{}) {
+func Log(xs ...Fer) {
 	DefaultLogger.Log(xs...)
 }
 
 // Error logs an error and information about the context of said error.
-func Error(err error, xs ...interface{}) {
+func Error(err error, xs ...Fer) {
 	DefaultLogger.Error(err, xs...)
 }
 
 // Fatal logs this set of values, then exits with status code 1.
-func Fatal(xs ...interface{}) {
+func Fatal(xs ...Fer) {
 	DefaultLogger.Fatal(xs...)
 }
+
+// FatalErr combines Fatal and Error.
+func FatalErr(err error, xs ...Fer) {
+	DefaultLogger.FatalErr(err, xs...)
+}
diff --git a/vendor/github.com/pkg/errors/stack.go b/vendor/github.com/pkg/errors/stack.go
index 6b1f289..cbe3f3e 100644
--- a/vendor/github.com/pkg/errors/stack.go
+++ b/vendor/github.com/pkg/errors/stack.go
@@ -79,6 +79,14 @@ func (f Frame) Format(s fmt.State, verb rune) {
 // StackTrace is stack of Frames from innermost (newest) to outermost (oldest).
 type StackTrace []Frame
 
+// Format formats the stack of Frames according to the fmt.Formatter interface.
+//
+//    %s	lists source files for each Frame in the stack
+//    %v	lists the source file and line number for each Frame in the stack
+//
+// Format accepts flags that alter the printing of some verbs, as follows:
+//
+//    %+v   Prints filename, function, and line number for each Frame in the stack.
 func (st StackTrace) Format(s fmt.State, verb rune) {
 	switch verb {
 	case 'v':