Bug 549527 - Make tooling mode configurable as Eclipse preference

* Add a new bundle org.eclipse.emfforms.ide.preferences for IDE tooling
preference contributions
* Add a preference page which allows configuring the tooling mode
* ToolingModeUtil reads mode from the preference instead of the runtime
parameter

Change-Id: I60dfd7245f71fb14362521c33aa7e4d6ff15dcf3
Signed-off-by: Lucas Koehler <lkoehler@eclipsesource.com>
24 files changed