fixed log_event() so it works if no log was manually made first
added stringify() method to make printing logs easier
fixed overwrite of input fastqs if splits == 1 and the job is repeated after the symlink was already made
made behaviour() rw so that it can be called without error (even just for reading)
message() now a Text column; new show_traces option for stringify()
added log_event() calls; tried to fill in edge case where a claim_and_run is supposdily successful, yet claim did not get set in db and then the job dies
added log_event() calls; all trigger() calls are now verbose
added log_event calls for moving or deleting stepoutput files
added log_event() calls
Merge branch 'develop' of /software/vertres/git/origin/vr-pipe into develop