Minor releases of the command line and GUI mozregression tools.

On the command line side:

• new feature, you can now use a buildid instead of a date when doing the bisection or running a single build (bug 1217906):

mozregression --launch 20151102030241

• added a new parameter to control the tested binary output, -P/--process-output (bug 1214386)
• a few improvements for the general output (bug 1225755, bug 1225548 and bug 1227134)
• fixed a bug in the back command, when it was used after a skip (bug 1203855)

On the GUI side:

• allow to choose a buildid or a release number instead of a date (bug 1225437)
• fixed a bug that prevented to use a profile directory containing non-ascii characters (bug 1224083)