Version 0.2.3

Spatial map viewer improvements:

• Calculates nearest neighbors on the fly
• Works with data from Consolidated_data.txt (doesn't need nearest_neighbors.csv)
• Supports multiple positivity and expressions in phenotype selectors!

Component levels report:

• Allow the user to enter the quantile(s) to display on the histograms.
  If two or more quantiles are entered, include a signal-to-noise table
  in the report, showing the ratio of the highest quantile to the lowest.

Bug fixes:

• Fixed a problem that caused the analysis addin to incorrectly report
  zero cells in a phenotype (#15).