a couple of documentation fixes.

- We've got 1.0.0, so no need for version pinning now.

- `%Z` is formatting-only specifier but wasn't clearly documented.
  Fixes #38.

README.md

@@ -34,13 +34,6 @@ Put this in your `Cargo.toml`:
 chrono = "0.2"
 ```
 
-Or in the case you are using Rust 1.0 beta, pin the exact version:
-
-```toml
-[dependencies]
-chrono = "=0.2.14"
-```
-
 And put this in your crate root:
 
 ```rust

src/format/strftime.rs

@@ -62,7 +62,7 @@ Spec. | Example       | Description
 `%r`  | `12:34:60 AM` | Hour-minute-second format in 12-hour clocks. Same to `%I:%M:%S %p`.
       |               |
       |               | **TIME ZONE SPECIFIERS:**
-`%Z`  | `ACST`        | Local time zone name.
+`%Z`  | `ACST`        | *Formatting only:* Local time zone name.
 `%z`  | `+09:30`      | Offset from the local time to UTC (with UTC being `+00:00`).
       |               |
       |               | **DATE & TIME SPECIFIERS:**

src/lib.rs

@@ -30,13 +30,6 @@ Put this in your `Cargo.toml`:
 chrono = "0.2"
 ```
 
-Or in the case you are using Rust 1.0 beta, pin the exact version:
-
-```toml
-[dependencies]
-chrono = "=0.2.14"
-```
-
 And put this in your crate root:
 
 ```rust