Divide this project into two: one will be nonbio (TzokCommons)
Short display name and AverageAngle changes

- The interface DisplayableExportable changed so that every implementor has to
  provide separate implementations for getShortDisplayName() and
  getLongDisplayName()
- AverageAngle now holds information about the angles it considers. It is also
  responsible for filtering all angle values or deltas to calculate the
  average.
Use specific angle formatting methods
Store required angles inside the class
Fix a typo
Switch to Java6