Fixed issue :- https://bugzilla.redhat.com/show_bug.cgi?id=747839
Issue:- Client misreports server url from zanata.xml
Fix:- zanata-python-client strips last / from URL, however if someone gives // at the end of URL
Then zanata-python-client gives a warning that, for this URL removing last '/' but check your URL in zanata.xml
Fixed Bug:- AttributeError: 'NoneType' object has no attribute
Fix: if one of the pot file doen't exists then give an error message and continue with next file
Better to use decorators so that we can avoid repetition of code
Merge pull request #5 from gnuman/master

Bux fixes and removed duplication of code