Axdt planning for the 0.0.8 release

#185 The next version of AXDT will use the Eclipse TMF framework Xtext and will drop any dependencies to the Eclipse Imp Framwork. I decided to cleanup Axdt because the change of framework requires to refactor large parts of the code base anyway.

Axdt will drop the Flex 3 SDK and only redistribute the new Flex 4 SDK. (I don't see any additional value in making both available.)

In the new version the Flex SDK will redistribute all required libraries, even if there are already bundles from eclipse orbit. This allows us to simplify and fix ant support (orbit libraries are not exported to the ant classpath, this cannot be fixed with a plugin fragment).

Axdt will drop the Flex Designview. The reason is simply that the designview is not stable enough. It will take the user time to get it working and then disappoint by the poor workflow.

The SWFView will be dropped instead the internal eclipse browser support will be used. You will be able to choose whether to open the browser as view or editor.

For all the nice features Xtext brings to Axdt we will loose unicode identifier and xml literal support.