Stripped recognition down

Only horizontal and vertical lines will be recognized. Other shapes will
be drawn using tools.
Added ToolDraw set of tools to Xournal
Fixed two typos in linking GUI for new tools
Finalize TeX move on mouse release

This allows for editing of TeX content without it flying around, if the
selection hasn't been finalized (deselected) yet. Fixes bug #79.
Changed xournal to xournal++ in titlebar
Added to toolbar and fixed bug in Tool.cpp
Added pixmaps for new drawing utilities
Merge branch 'master' of https://github.com/xournalpp/xournalpp
Added Ruler to the Draw Combo Box
Minor usability changes
Moved Rect/Circ/Arrow into Ruler group
Added sketch for rectangular draw.
Fixed a few typos for compilation
Compiles now - but contains some serious bugs!
Rectangle now works. Need to fix button signals.
Finished circle routine
Moved most of the shapes out of Tool to Ruler.
Changed radio buttons to text boxes
Fixed a few loose ends. Tools GUI still needs work.
Fixed toggle