Splitted constansts according to repos:
* UtilityValues split in two according to the repos that depended on it
(mesh_reasoning is an add-on to the core knowrob)
* UtilityValues renamed to Thesholds.java
* refactored Edge and Vertex classes accordingly
Clean-up on the parser side:
* made sure all of the I/O are terminated to avoid leaks
Brushed up Model class:
* minor refactor, removed dead-code and improved documentation
Brushed up parsers:
* documented small contributions for history completeness
Brushed up implementation of utils:
* improved documentation & minor optimizations on the utilities classes of
the CAD parser
Brushed up implementation of common utils:
* documentation improvement to acknowledge minor refactors for history
completeness and possible future reference