Coralme

1. Removed print in get_graph function
2. GPR combination cutoff works, solved bug, stable version. This allows to stop the combinatorial explosion before it happens, necessary for >10k combinations from long GPRs in some models. Before: coralME would take several minutes computing all combinations and then not using them due to the length of the list. Now: coralME identifies it crossed the cutoff (default = 100) and stops.

Corrected STOP condition for combination cutoff. Was overestimating length.

Corrected STOP condition for combination cutoff

1. GPR combination stop fixed. Generification now stops when it crosses number of complex combinations cutoff.
2. BLAST now uses 1 thread as default, can be changed using blast_threads=NUMBER_OF_THREADS in input.json or elsewhere in configuration.

2. Retrocompatibility to change bounds after NLP construction