changing the generated grammar into the new sdf3 style
dropped old sdf2 tools and use Ant Macros in the new targets
using the new signatures library
fix folder discovery when packing esv files
show error dialog when trying to apply a builder when there are error markers in the file
Merge pull request #9 from metaborg/sdf3-changes

Changes in the generator due to the new SDF3 implementation.
Show error dialog when trying to apply a builder when there are errors markers in the file.
fix build generator
fix build and descriptor generators
covering cases where there is no syntax folder
fix target to generated the pp library
Changes for build script simplification.
Run all target so that dist folder is generated.
Fix duplicate maven-compiler-plugin definition.
Don't run Java compilation in Ant build, when building from Maven.
Make sure that Eclipse plugins are not installed and deployed.
Move SDFBundleCommand crap to metatooling.
Don't skip installation and deployment, not required.
Move aster, make-permissive, sdf2imp poms into subdirectory, so that target directory is not overwritten. This fixes a problem where some build orders make the build fail.
Changing packaging type of installer POMs to pom, move actual metadata to pom-jar.xml file.
Run install Ant target during process-classes phase instead of prepare-package, to make sure that all resources are included.
Make sure to clean the dist folder when cleaning the generator.
Copy dist resources manually, since these resources are produced after compilation.