Improve name searching. closes #1137

couchpotato/core/helpers/variable.py

couchpotato/core/plugins/base.py

couchpotato/core/plugins/searcher/main.py

couchpotato/core/providers/base.py

couchpotato/core/providers/nzb/ftdworld/main.py

couchpotato/core/providers/nzb/nzbclub/main.py

couchpotato/core/providers/nzb/nzbindex/main.py

couchpotato/core/providers/nzb/nzbsrus/main.py

couchpotato/core/providers/nzb/omgwtfnzbs/main.py