Fixing problem with scroll in commit history graph. This fixes #101.
Color of collapsed nodes is now chosen according to the type of contained nodes. This closes #102.
Collapsed nodes now show the number of containing nodes. This closes #103.
Added "Collapse by Type" option in order to collapse all nodes of the same type. This closes #104.
Fixing version number that was left in hard code in ApplicationVersionUtils. This closes #104.