Added maven pom.xml files.
Update generated files
Update gitignore
Adapt to new language build.
Fixes for two-stage build and cleanup.
Made strj and the generator Java projects. Remove dependence on strategoxt.jar for everything.
Update generated build file.
Merge branch 'mvn-build'

Conflicts:
	org.strategoxt.imp.editors.stratego/build.generated.xml
Add project metadata to POM files, required for publishing to the Maven central repository.
fix build files
fix build files and ignored src-gen folder
covering cases where there is no syntax folder
fix target to generated the pp library
Changes for build script simplification.
Make sure that Eclipse plugins are not installed and deployed.
Don't skip installation and deployment, not required.
fix build files
new build.generated.xml
Update generated build file.
Bump version to 1.3.0-SNAPSHOT
Merge branch 'master' into spoofax-release