Layout qualifier location standard

[shrekshao]

From Christ ogl sample:
Might follow this later

namespace semantic
{
    namespace buffer
    {
        enum type
        {
            STATIC = 0,
            DYNAMIC = 1
        };
    };

    namespace uniform
    {
        enum type
        {
            MATERIAL = 0,
            TRANSFORM0 = 1,
            TRANSFORM1 = 2,
            INDIRECTION = 3,
            CONSTANT = 0,
            PER_FRAME = 1,
            PER_PASS = 2,
            LIGHT = 3
        };
    };

    namespace sampler
    {
        enum type
        {
            DIFFUSE     = 0,
            POSITION    = 4,
            TEXCOORD    = 5,
            COLOR       = 6
        };
    }//namespace sampler

    namespace image
    {
        enum type
        {
            DIFFUSE = 0,
            PICKING = 1
        };
    }//namesapce image

    namespace attr
    {
        enum type
        {
            POSITION = 0,
            NORMAL   = 1,
            COLOR    = 3,
            TEXCOORD = 4,
            DRAW_ID  = 5
        };
    }//namespace attr

    namespace vert
    {
        enum type
        {
            POSITION = 0,
            COLOR    = 3,
            TEXCOORD = 4,
            INSTANCE = 7
        };
    }//namespace vert

    namespace frag
    {
        enum type
        {
            COLOR   = 0,
            RED     = 0,
            GREEN   = 1,
            BLUE    = 2,
            ALPHA   = 0
        };
    }//namespace frag

    namespace renderbuffer
    {
        enum type
        {
            DEPTH,
            COLOR0
        };
    }//namespace renderbuffer

    namespace storage
    {
        enum type
        {
            VERTEX  = 0
        };
    }//namespace storage
}//namespace semantic