Log package versions

The version of major dependencies 'httplib2' and 'mwparserfromhell'
shoud be written to the log, and included in the script version.py.

In verbose mode it is helpful to see what other major packages are
being automatically loaded into the python environment, and their
versions.

Move the online startup checks after the local checks.

Change-Id: Iae9f73b23ab1eb1a4acce46a690c0b4f9f9396a8
Merge "Log package versions"