Merge pull request #378 from lucidd/master

Update README
DataBuffer implementation
Cleaned up the old Blob
Update to nightly
Merge pull request #380 from cmr/rustup-9/14/2014

Update to nightly
Updated all the examples to pass in slices
Merge pull request #379 from sectopod/data

Data buffer - the proper replacement for `Blob`
Fix example links in README
Merge pull request #382 from escalant3/readme_fix

Fix example links in README
Update gfx_macros for the Gc -> P change in syntax
Merge pull request #383 from tomjakubowski/fix-for-p

Update for the Gc -> P change in libsyntax
Fix typo in README.md

Crate heirachy -> Crate hierarchy
Cleanup warnings
Merge pull request #386 from lucidd/cleanup_warnings

Cleanup warnings
Renamed `buf` to `command_buffer`

Closes https://github.com/gfx-rs/gfx-rs/issues/388
Merge pull request #389 from bvssvni/master

Renamed `buf` to `command_buffer`
Fixed update_buffer_vec bug

Closes https://github.com/gfx-rs/gfx-rs/issues/390
Use add_vec from add_struct
Merge pull request #392 from bvssvni/master

Fixed update_buffer_vec bug
Refactored shader parameter values to be mutable references to vectors.