honor RestAuthCommon 0.6.5 release
add pragmas for py2/py3
use sys.version_info instead of import errors for imports (also little faster on py2)
use official username/pass for testing
use common coverage_path
update language classifiers
Merge branch 'master' of github.com:RestAuth/RestAuthClient

Conflicts:
	RestAuthClient/common.py
use r'', so we can use \b
add pragma for py3.4
set client class as object property
o not use mutable default arguments
precompute connection kwargs
Default pep8 to linewith of 99
pure cosmetics
use python3.4 docs
RestAuthConnection offers an optional ssl_context parameter in Python3
add timeout and source_address fields
remove unused variable
do not sys.exit() upon import error - not really stylish for a library
no longer store user/password directly in connection (is redundant anyway)