Fix setting config_name when init MockManager.
Write test for capability to check config file with non ascii chars.
Correct checking config file with non ascii chars.
Relative import ui plugins.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	flexget/manager.py
Revamp test for finding loading and pre checking config file.
Patched only Instance, not class.
Merge pull request #16 from shtimn/master

Correct checking config file with non ascii chars.