Start the signal thread, so we can Ctrl+C ola_recorder, also exit with a nonzero status if a file is invalid during verification
Handle DOS line endings in ola-recorder, fix a bug with returning exit codes when verify a file. Write a check to use the new verification code.
Merge pull request #524 from peternewman/e1.37-2

Fix some bugs, make some improvements, and add some new checks around ola_recorder