Added modify listener for password and user

Change-Id: I3c4c857f556f93079aed780340e2fee9c9831875
Signed-off-by: Simon Scholz <simon.scholz@vogella.com>
Added constants for NodePath and preference keys

Change-Id: I924fd9480b7b2130ee3c8d57f0499d674022a9e9
Signed-off-by: Simon Scholz <simon.scholz@vogella.com>
Merge pull request #8 from SimonScholz/eclipse44passwordDialog

Eclipse44password dialog