added support for RASCAL.MF in Rascal commandline. If the main class is
activated using the META-INF/MANIFEST.MF information for Java, and
META-INF/RASCAL.MF exists, then the module and main function declared in
the RASCAL.MF file will be executed and any commandline arguments will
be passed there.
new commandline feature
debugging the CLI
can now run commandline tools
streamlining help messages of cli