* introduced new G2Core enums for DataFormat::Base and DataFormat::Internal as well as DataType and completely reworked the loading for textures using these more granular data
 * adapted all the rest of the engine code to use the new enums
 * adapted all tests to use the new enums
 * moved texture loading from file using Devil Image Library into GlGfxAPI and extended interface
 * removed lib dependency to Devil Image Library from GEAR 2.5 Project
 * removed lib dependency to Cg from GEAR 2.5 Project