Add Image class empty interface
Add obj(mrb_value self)
Bind Image#rotate90(rotation)
Bind Image#resize(width, height)
Bind Image#crop!
Bind Image#crop
Return self
Bind Image#mirror
Bind Image#update
Bin Image#set_ancher_percent, set_ancher_point, reset_anchoer
Combine init & draw
Bind Image#clone
Bind Image#draw(x, y, w, h)
Bind Image#draw_sub
Bind Image#width, height
Refactoring
Change position
Bind Image#grab_screen
Bind Image#save