Enhanced process launcher and logger display

- Added ProcessMonitor for tracking which process are currently executing
- Fixed bug where the state of the selected nav-item within the nav-bar was not being displayed properly
- Embedded cancel button within log output to allow executing process to be cancelled
- Added very basic support for hiding/displaying log output (needs to be improved)
Merge branch 'master' of github.com:christophd/citrus

Conflicts:
	modules/citrus-admin/src/main/java/com/consol/citrus/admin/launcher/ProcessLauncherImpl.java