Minor refactoring
Import cleaning
Adding .pom file (Maven tycho autobuild conf) to gitignore
Adding basic outline support
Currently NOT supported :
*bidirectional communication (e.g. change of a method name in the outline treeviewer automatically change the name in the editor)
*bidirectional selection highligthing  (e.g  selection of an attribute in editor automatically highlight corresponding node in the treeviewer of the outline)

Note : there is two label providers :
-NitOutlineLabelProvider : legacy, only present to show the old method used to feed the tree with formated label (getImage + getText (plain text))
-NitStyledLabelProvider : current way to feed the tree with rich label (images + rich text (colors))