renamed chunk flags to mirror variable names they are used for
started reversing and implementation of tex format
unfinished redoing rendering of area file with shaders and height map texture

credits to Sean Harmer
http://www.kdab.com/opengl-in-qt-5-1-part-5/
added accessors for array data
basic rendering of first patch
trying to figure out issues on height map
basic implementation of rendering a whole area file via shader