add the hidden/ghost behaviour:
- The view hide or show the nodes calling their functions hide() or show(ghost).
- The node and the edges have the attributes 'hidden' and 'ghost' to properly redraw them selves.
#Wed Jul 02 17:20:02 CEST 2014
distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-2.0-bin.zip