Added the Insert Tex to the main menu (glade)
Just need to finish the Control.cpp and PageView.cpp.
Altered PageView and Control. Still not 100%.
Compiles. Still need to fix Tex insertion and mod.
Mathtex now renders.
Fixed the DPI for better resolution graphics.
Added the undo actions for latex.
Added the XML node for saving Tex images.
Added the load/save functionality for Latex images.
Fixed up the TexImage for const strings.
Fixes #14
Added Mathtex fully. Fixes #13.