Update CString to convert to string instead of strbuf
Merge pull request #40 from dguenther/update_string

Update CString to convert to string instead of strbuf
update to last Rust
- Eq / Ord reform
finalize Eq/Ord renaming + hide warning for snake_case lint
fix pong example
- librand -> std::rand
update to last Rust
- add unsafe_destructor feature
update readme
update compilation to Cargo build system
fix travis
prepare rsfml to Rust *T / *mut T -> *const T / *mut T reform
fix to last Rust
- *T -> *const T
Update several things for latest master.

Enum repr seems to have changed.  PartialOrd changed as well, and initializer lists for structs apparently don't like p3 : 0 as c_float any more, as the type of 0 can't be immediately determined.
Merge pull request #41 from brandonson/master

Update several things so lib works with latest master.
Update README.md
update to last Rust
- crate_id -> crate_name
update to last Rust
- index traits changments: remove index for convex shapes, and update impl for vertex arrays
Update example
Merge pull request #42 from tyrannosaurus/master

Update example
try fix travis
fix travis build