Rebuild the gwt-dev-tools.jar and document how to do it.

[GoogleCodeExporter]

The libs/gwt-dev-tools.jar in the com.google.gwt.eclipse.core is extracted from 
the GWT tools so that the plug-in can invoke JSNI functionality in its editor. 
The current version is quite old and caused out-of sync compilation issues when 
moving to Tycho/Maven.

Currently the method of rebuilding the jar is to somehow use the 
tools/gwt-dev-tools and tools/gwt-dev-tools-gen projects to extract the needed 
GWT classes and their transitive dependencies (which included JDT code, hence 
the out-of-sync issue). Figure out whether it is better to just rebuild that 
full set of transitive dependencies (and make sure the use of third party 
libraries is documented) or find the third-party dependencies in the Orbit and 
other Eclipse plug-ins.

Original issue reported on code.google.com by [email protected] on 5 Feb 2015 at 7:53