Documentation building process

[linuswagner]

At the moment, the role of the RASCAL.MF and the pom.xml file in a Rascal project are not well documented.
What I found was the comment for lib schemes.

It would be nice to have a description what is needed in order to get a Rascal project to successfully build using Maven that includes the role of the individual files in the context of Rascal. The documentation can reference the Maven manual for not Rascal specific things

[linuswagner]

Should explain that meta inf is used (besides others) to identify rascal project when resolving dependencies (rather than pom file, still no idea if that is used for anything outside of maven)

[DavyLandman]

One of the reasons is that we do not really like RASCAL.MF, and want to replace it with something better. Both the semantics and the syntax.