started refactor of analysis service to minimize IO

[nathandunn]

fixes #3

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• [x] validate numbers
• [ ] clean out code

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• [x] fix dark blue highlighting in hover
• [x] fix dark blue highlighting in pathway score (and gene score if needed)
• [x] validate against existing gene set / cohorts
• [x] fix sample versus pathways via average, PATHWAY score is wrong when changing cohorts

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• [x] fix sorting?

• [x] test implementation

• [x] allow change of cohort

• [x] write backing tests

• [x] createMeanMap:

  • [x] getGeneSetNames
  • [x] getDataStatisticsPerGeneSet
  • [x] getDataStatisticsForGeneSet
  • [x] getZSampleScores
  • [x] getZPathwayScores
  • [x] getZPathwayScoresForCohort

• [x] calculateCustomGeneSetActivity (implement test)

[nathandunn]