Remove Cargo.lock

Apparently, for libraries, they should not be included!
Fix wrong assertion
Fix vertex_format macro not working in modules
Merge pull request #173 from cmr/master

Remove Cargo.lock
Merge pull request #178 from tomaka/fix-176

Fix vertex_format macro not working in modules
Merge pull request #175 from tomaka/assertion-fix

Fix wrong assertion
Implemented CustomShell typedef by shader_param macro
Implemented unused attribute for shader_param
Improve Renderer::errors implementation
Merge pull request #181 from bjz/errors

Improve Renderer::errors implementation
Merge pull request #179 from kvark/shell

`ProgramShell` typedef for `#[shader_param]`
Passing more parameters by reference into draw()
Merge pull request #182 from kvark/draw-ref

Passing more parameters by reference into draw()
Change LitIntUnsuffixed to LitInt to reflect rustc change https://github.com/rust-lang/rust/commit/0dc215741b34236c310e409c437600ba0165c97c
Merge pull request #184 from csherratt/fix_build_break

Change LitIntUnsuffixed to LitInt to reflect rustc