gui:
	- added button for custom icons view in icons toolbar
started skeleton of custom icons:
	- created servlet load custom icons 
	- registered servlet in plugin.xml in core
	- added method in core service for providing icon paths
	- modified icons view to show also custom icons
	- added message for icons view
	- created a dialog result handler to pass to icons view
part1: custom icons view
	- modified servlet for fetching custom icon
	- modified method in core service for providing list of custom icons
	- modified mind map icons component to integrate service call
	- works for adding custom icons; default icons are added, but the view
does not display them
	- added constants for diferentiating the adding of custom icon or
default icon
part2:
	- fixed displaying default icons
	- custom icons displayed first now
	- message displayed in a StyleableTextField, to allow word wrap
	- added view with custom icons also in properties view
	- added parameter in click handler function for the ... button in
properties view to get selected nodes => got repo from node uri
details:
	- added icon for icons bar to open custom icons view
(ExternalImageAddAction)
	- modified icon path in resources for custom icons icon
	- fixed bug in generating string of custom icons names in
CoreService.getCustomIconsPaths
	- added condition for showing custom icons view only for mindmap nodes
GH371 git staging review
Merge remote-tracking branch 'origin/master' into GH371-git-staging-review
Merge remote-tracking branch 'origin/GH95-custom-icons'
#371 - Merge remote-tracking branch 'origin/GH371-git-staging-review'

Conflicts:
	org.flowerplatform.flex_client.team.git/src/org/flowerplatform/flex_client/team/git/GitConstants.as
	org.flowerplatform.flex_client.team.git/src/org/flowerplatform/flex_client/team/git/GitPlugin.as
	org.flowerplatform.team.git/src/org/flowerplatform/team/git/GitConstants.java
	org.flowerplatform.team.git/src/org/flowerplatform/team/git/GitService.java
#371 - final code corrections after review