update example to work with the new libnative
Merge pull request #17 from sp0/master

Uncommented operator trait implementations for Vector2f (they seem to wo...
update travis + use operator traits for Vector2f on pong example
clean the example of the readme
remove sound_recorder
remove @mut from render_window
remove @pointer from shape. need to be tested
shape work
clean shape
remove managed_boxes feature, since there is no more @pointer on rsfml
remove impl of trait Eq for VideoMode, and add deriving for Eq and Ord
add shape example
Move WindowStyle enum in its own module, updates examples + lib + readme + doc
no need to reexport libc types...
derive Eq on vector2/3
fix syntax on readme + clean reexports on system mod
don't reexport all the function from the audio::listener mod
clean imports + remove all the globs imports + remove the globs feature + add a bit of doc
test rustpkg
revert rustpkg