obfsproxy bundles.

- Also added a bit of documentation for users that a obfsproxy bundle
  is available for different platforms

- Fix the gettor source code repository URL
- Adjust the copyright year
- Change the default rsync host

Fixes #4163.

nice response by GetTor telling you so. Fixes #4166, #2520
and parts of #3920

but it's because we don't want to hand out xpi's separately, not
because he refuses to do bignum math on the xpi files.

log files with old packages names around..

apparently this is all that has to be done?

- Be less tolerant with the 'split' keyword. Apparently, Yahoo
  default reply sometimes makes GetTor send out split packages
  even though the user didnt want a split package

- Fix minor bug in package reply (actual package name and # of
  parts instead of "%s")

- Give more verbose stacktrace if some exception occurs

"tor-browser-bundle"

Fix a bug in delay alert sending

Conflicts:
	lib/gettor/i18n.py

Adapted the documentation to the new Transifex situation

- Users can request a configurable number of packages until they're
  blacklisted, instead of only one
- After copying the email normalization code from BridgeDB (thanks,
  rransom) abusing GetTor just got a bit harder

Closes #3381