Fixed a bug where the initial graph layout was not initialized correctly.
Fixed a crash when adding a new vertex to the static layout.
Fixed a bug where the edge and background colors of newly generated graphs were not set upon creation.
Fixed a bug where deleting vertices from a graph and then saving it caused problems when loading the graph layout. This closes #42.
Merge branch 'vladi' into develop

Conflicts:
	src/main/java/controller/Controller.java
Updated newly added code from develop so that it does what code from vladi does