234: Command Line Interface

[Ortner]

Issue

See #234

Solution

Added command line interface. And a gradle build script (that should be comparable to the SBT build file), that generates a fat jar with all required dependencies included. The license of the required ASM packages is added to the pom file. I'm not familiar with SBT, so there is no implementation in those build files yet (can anyone help out?).

fixes #234