v1.4.8

Commits

• _VERSION is lua's variable, we can overwrite it (niu2x)
• e7aab70: delete unused file (niu2x)
• 95c63a0: add jpg/tga/bmp support to image_t (niu2x)
• 53bc3d5: add luafilesystem (#6) (niu2x) #6
• e29b62d: add lpeg, lupa (niu2x)
• 0df3ffe: update version to 1.4.8 (niu2x)