#2 Remove Duplicate Declarations From Renderers

[jeffbackes]

Although it doesn't save any space, having the constants for the renderers
repeated in each renderer is just asking for trouble.

Also I have used an enumerated type (java5) for imagetype_t and
modtype_t

[jeffbackes]

enumeration

[jeffbackes]

another type declaration

[jeffbackes]

File of vertex constants