Returning result ID via CyRest

-Work on CyRest support

-Fixed bug using ILP when selecting heuristic mode
-Fixed bug with discarding solution sometimes not removing subgraphs/metagraph
-Fixed bug with infinite gap values being formatted incorrectly
-Enabled highlighting of clusters in meta-graph
-Enabled returning to original network view upon result destruction
-Fixed bugs with cluster-view sometimes using incorrect styles/layout
-Reworked concurrency / synchronization
-Various smaller performance issues

Various small layout optimizations/fixes
Added killswitches for result processing tasks
Backend optimization

Enabled invalidation of solutions upon changes affecting the original network
Enabled generation of cluster views for specific clusters
Backend optimization

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Fixes for wrong meta-graph layout
Refactor

Made ChangeListener for Columns less strict