v3.1.2

#20 Handbook Creator should output relative paths
#21 Improve code metrics
#26 Dynamically created file for Mac launchers should not be included in CRC calculation
#27 TestRunner build_test_suites destroys CustomTestSuite if underlying test procedures change
#28 TlmGrapher - Undefined method nan? for 0:Fixnum
#35 Race condition starting new binary log
#36 TlmDetailsDialog non-functional
#37 Remaining TlmGrapher regression
#38 Allow INTERFACE_TARGET to work with target name substitutions

Migration Notes from COSMOS 3.0.x:
The definition of limits persistence has changed. Before it only applied when changing to a bad state (yellow or red). Now persistence applies for all changes including from stale to a valid state and from bad states back to green.