Updated user agent

Fixes #150 yowsup-cli fail to register
Fixes #144 registration fails with old version for new phone.
Fixes #133 New Token in warequest.py
Merge branch 'master' of https://github.com/tgalal/yowsup

Conflicts:
	src/Yowsup/Common/Http/warequest.py
	src/Yowsup/Common/constants.py