fix zsample score

[nathandunn]

fixes #10

• [x] fix samples being put on the wrong pathway / geneset
• [x] validate sample in geneset and gene
• [x] see if this fixes it or not
• [x] add 3 more (validated) tests for mean and variance getDataStatisicsPerGeneSet . . as the current results are wrong
• [x] revalidate zSampleScores test

[nathandunn]

When switching cohorts, we get the wrong order for the gene set scores. When I upload a new geneset, especially the same one with a new name (no re-calculation), we get the correct results (pathway sample scores), indicating that the order is wrong:

Correct:

Incorrect:

[nathandunn]

correct:

vs incorrect:

[nathandunn]

Its correct, as its still using the client-side activity calculation method, which preserves the zSample scores.

[nathandunn]

The go id, golabel, gene are in reverse order.

vs bad:

[nathandunn]

The go id, golabel, gene are in reverse order. Pathway Activity is in the SAME order. Samples are correct.

Pathway sample activity is reversed. As such, the pathway activities are associated with the wrong sample activities. So, only the pathway activities are wrong.