Version 0.2.6

Analysis addin:

• Don't require tissue segmentation in the inForm project (#4).
• Add the ability to compute H-Score for individual phenotypes (#30).
  When selected, additional H-Score worksheets and charts will be created in the
  output reports.
• When "Use regular expressions" is checked, the regular expression will
  match anywhere in the Slide ID, not just the prefix.
• Fill in missing tissue categories so all slides have all categories
  reported (#1).
• Report missing / invalid values consistently as #N/A, never as #NUM.

Merge addin:

• Fix a problem that caused data corruption when cell seg data is
  formatted with comma as decimal separator (#31).

Misc:

• Use the RStudio folder chooser when available, rather than the Windows
  native chooser. The RStudio chooser is nicer and gives access to
  network drives (#29).