Updated builder to match SpokenCompiler refactoring.
* Mark SpokenBuilderNature as dependent on Java nature.
* Add reference to grammar project.
* Add spc.jar from spc-compiler and antlr as runtime jars.
* Recursively pick up changed resources for builder.
* Attach source for grammar/bin.
* Pass real path to SpokenCompiler.
Save generated java code into project resource so Eclipse can compile it.
Merge pull request #1 from yetamrra/eclipse_builder

Eclipse builder