Initial implementation of VertexFormat trait and the deriving attribute
Mesh macro - Partially implemented type decoding, improved general structure.
Mesh macro - offset computation, type parsing with attributes
Mesh macro - cleaned up the old mesh Builder, imported stuff from mesh namespace directly, fixed the example.
Mesh macro - refactored field modifiers with syntax::mark_used, pre-allocated the result vector
Added macro test module
Added create_mesh() convenient method, used in the triangle example
Merge pull request #122 from kvark/vertex

Vertex format generator macro