Merge pull request #75 from mkaring/1.4

TextField Bugfix
Merge pull request #76 from mkaring/1.4

Decrease CPU load caused by Draggable
Merge pull request #77 from mkaring/1.4

Removed useless listener notification during layout
Merge pull request #78 from mkaring/1.4

Fixed but in treebox
Removed redundant compiler configuration.

The same configuration is in the master pom.
(Verified by diffing the effective POM as presented by Eclipse m2e.)
Set Java version from property instead of by plugin configuration.

This makes it somewhat easier to override the Java version from
child POMs.
Also, it does not nail down the maven-compiler-plugin version
anymore. Sure enough, this bumped the version from 2.3.1 to 2.3.2
(2.3.2 fixes http://jira.codehaus.org/browse/MCOMPILER-109).
Merge pull request #79 from toolforger/maven-cleanup

Maven cleanup
Improved drag and drop

Added possibility to manually change the droppable that is parent to a draggable
Merge remote-tracking branch 'GitHub-void/1.4' into 1.4