Merge pull request #50 from crumblingstatue/master

Fix examples in docs
remove warnings
add draw_primitive method to RenderTarget
fix travis
fix warnings from last Rust
mut_null is now null_mut
update to last Rust
- Vec::from_slice is now slice.to_vec()
update to last rust, invisible_private_type lint removed
Fixed typos and improved wording.
Update README.md
Merge pull request #52 from akunaatrium/master

Minor improvements to the readme.
update to last Rust
- move is now a keyword -> move_
update to last rust
- multiple #cfg semantics
- pop_byte deprecated
fix build to last Rust
- static -> const
- warnings: const uppercase
fix to last Rust + update travis + change rsfml.rs to lib.rs
fail -> panic
Merge pull request #55 from steveklabnik/master

fail -> panic
Update to new lint names