Added method for getting local branches to LocalRepoParser
Framework for GBranchLabel class

GBranchLabel will represent a label showing a branch at a particular
commit
Added the updateInfoWindow function to mainwindow.cpp.
Merge branch 'master' into MainUI
"Merging the latest from master into MainUI"
GBranchLabel object finished

GBranchLabel now works correctly and displays its branch name in its
center. Still not connected to branches in repo
Merge branch 'master' into canvasUI