Release 0.9.0

A default run of sass-spec found 1661 of 3482 tests passing.

Changes since version 0.8.0 includes:

* PR #24: Implement a Rgba type and use in css::Value and sass::Value.
* PR #22: Partial support for `@at-root`.  Supports `&` back-refs but
  not `with` and `without`.
* Add "foo/index.scss" and "foo/_index.scss" when attempting to find
  "foo" for import.
* The parser should fail rather than crash on some non-utf8 input.
* PR #21: Introduce a Number type, mainly for sharing some abstraction
  between css and sass values.
* Make the `rgba` function handle non-numeric inputs (e.g. calc(...)).
* Implement the `feature-exists` function.
* Make `!important` part of value rather than property, so it can be
  used in fuction / mixin arguments etc.
* A css3 pseudo-element selector may have arguments.
* Add support for unicode ranges.
* The `@each` construct can bind multipe values.
* PR #20: Division is now a BinOp rather than a special case.
* Minor improvement in parsing and formatting at-rules.
* Fix some clippy complaints.
* Minor documentation updates.
* Some updates to travis build script and test structure.
* Add appveyour (windows) continous integration testing.
* Depedency updates: num-rational 0.2.1, nom 4.0 (PR #23) and rand 0.5.

Thanks to @killercup and rust-fuzz/targets#119 for identifying some
parser crashes on non-utf8 input.

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "rsass"
-version = "0.8.1-PRE"
+version = "0.9.0"
 authors = ["Rasmus Kaj <kaj@kth.se>"]
 categories = ["command-line-utilities", "web-programming"]
 keywords = ["scss", "sass", "css"]

README.md

@@ -25,8 +25,8 @@ The sass language [is defined in its reference
 doc](http://sass-lang.com/documentation/file.SASS_REFERENCE.html).
 This implementation is incomplete but getting there, if slowly.
 
-Progress: ![1583](http://progressed.io/bar/158?suffix=3&scale=336)
-of 3364 tests passed
+Progress: ![1661](http://progressed.io/bar/166?suffix=1&scale=348)
+of 3482 tests passed
 
 If you want a working rust library for sass right now, you will
 probably be better of with [sass-rs](https://crates.io/crates/sass-rs)

src/lib.rs

@@ -21,8 +21,8 @@
 //! doc](http://sass-lang.com/documentation/file.SASS_REFERENCE.html).
 //! This implementation is incomplete but getting there, if slowly.
 //!
-//! Progress: ![1583](http://progressed.io/bar/158?suffix=3&scale=336)
-//! of 3364 tests passed
+//! Progress: ![1661](http://progressed.io/bar/166?suffix=1&scale=348)
+//! of 3482 tests passed
 //!
 //! If you want a working rust library for sass right now, you will
 //! probably be better of with [sass-rs](https://crates.io/crates/sass-rs)