Fixed minor bug with Course, where a course's catalog hours showed extra zeros after
  the decimal.

  Removed explanation text for 'quick term reference' on admin page, it was hard-coded
  using old values, and was confusing.  Added extra explanation text to clarify.

  Added a setting for not auto-capitalizing institution names of transfer credits.
  Added a setting for minimum substitutable grade (instead of hard-coding "D")

  Added a setting & code for controlling whether zero-hour courses can be subbed
  for non-zero hour courses.  By default, this is set to not allow that; you can only
  sub zero-hour courses for other zero-hour courses.  Internally, those courses have 1
  "ghost" hour, due to limitations in the mathematics of FlightPath, true 0-hour courses
  can't be allowed.

  Corrected hard-coded URL for a reference to a help page which doesn't exist, for outdated
  subs.