replace borrow in structs with Rc< RefCell< Resources>> + update exemples to work with the new system
make examples work
use Rc for view instead of RWArc
Update README.md
update travis.yml to enable doc generation for rust-ci
fix travis build
update travis
update travis.
remove warnings from pong example
Merge pull request #21 from JeremyLetang/remove-borrow

Remove borrow who are too restrictive
rust-sfml is now build with make, update the examples to work (sound_capture), update travis
Update README.md
Update README.md
update doc
Update README.md
update internal ffi architecture
fix build
finalize internal ffi architecture + reexport + move sfml_types in ffi + clean import
big documentation clean-up to match with the new reexports + update some style
Merge pull request #24 from JeremyLetang/internal-ffi-refactor

Internal ffi refactor