Updated version of pyPAGE

[artemy-bakulin]

I have updated pyPAGE by adding to it functionalities of iPAGE-2, namely:

1. calculation of CMI
2. accession switch
3. common annotation format processing
4. making heatmaps
   Also I made minor changes to your code:
5. fixing a bug in get_gene_subset function
6. modifying consolidation strategy (sort pathways according to cmi not p-value)
7. modify result table content
8. modify hypergeometric test calculation (there we need to subtract 1 from k, an explanation is here: https://alexlenail.medium.com/understanding-and-implementing-the-hypergeometric-test-in-python-a7db688a7458)
   Also I added tests for the heatmap module (test_heatmap.py) and for the new version (test_run_2.py).