HgWeb: remove dependency on 'Meta' plugin

As per John Reese [1], the original Meta plugin has been rolled into the
Source Integration framework.

Fixes #95

[1] http://thread.gmane.org/gmane.comp.bug-tracking.mantis.general/3434/focus=3438
no file paths -> no branch fix

changesets with no file paths did not get branch assigned - import broken and could not continue.
FIX: if no file paths, assign trunk branch
Add missing strings
Bump version
SVN fixes (pull request #97)
Fix #66: bitbucket.org integration
Modify copyright
Added BitBucket.org integration (pull request #98)