Update mozregression to conform to pep8, minor cleanups for pyflakes/pylint

https://bugzilla.mozilla.org/show_bug.cgi?id=1018096
bug 1017105 - fixed - mozregression continues when unable to find a build
Merge pull request #103 from sinemetu1/bug1017105-better-crashing-when-build-not-found

bug 1017105 - fixed - mozregression continues when unable to find a build
added b2g support for moznightly
Print revision info right away after bisecting nightlies down to a day range

Previously we would only do this if we had inbound support for the version
under test
b2g inbound builds support for mozregression and renaming B2gNighly to B2GNightly
Merge branch 'master' of https://github.com/parkouss/mozregression into parkouss-master

Conflicts:
	mozregression/regression.py
Expand timestamp range of potential inbound builds

Because of a bug in our build system (https://bugzilla.mozilla.org/show_bug.cgi?id=1018907),
the previous range was too tight.
Bug 1022720 - Make use of mozversion to get application info