private to protected

there will be a texuredquad class
added texturedrectangle class
Texture added

+ getter
enables necessary options
the class is a decorater for vertexbufferobjects
added comments
added standard coordinates
added default constructor who inits a default vertexbufferobject
renamed texture_coordinates -> default_coordinates

default coordinates fits better
replaced blank vertexbufferobject with the decorater class

this is more dynamic than before
getter for id of the vertexbufferobject
better getter and setter name
fix for the getid and renamed getter
new spritesheet class for decorating a texture
added default constructor and comments
draw method for animating