Merge pull request #28 from pcwalton/snow-leopard

Fix build problem on Snow Leopard
Fixed removal of vertex array funcs when Mac != 10.6
Merge pull request #29 from Jeaye/master

Fixed removal of vertex array funcs when Mac != 10.6
Indexing additions
Merge pull request #30 from Jeaye/master

Indexing additions. etc
Added vertex_attrib_pointer_i32
Merge pull request #31 from Jeaye/master

Added vertex_attrib_pointer_i32
Added line_width
Merge pull request #32 from Jeaye/master

Added line_width implementation
Remove mode syntax.
Merge pull request #33 from metajack/no-modes

Remove mode syntax.
Selectively remove functions that don't link on OS 10.6.