Typo fix, add missing dot in translatable string.
Update pot file
Fix setup.py plugin_files

Fixes error in commit 25505c9216d84eee65ba1e230d6e9ce9600d5093
Revert unintended global change

made in commit 25505c9216d84eee65ba1e230d6e9ce9600d5093
Merge pull request #314 from Sophist-UK/sophist_fix_setup.py_windows_build

Fix setup.py plugin_files
PICARD-602: import missing log

Traceback (most recent call last):
File "/usr/lib/picard/picard/webservice.py", line 241, in _process_reply
handler(str(reply.readAll()), reply, error)
File "/usr/lib/picard/picard/collection.py", line 102, in request_finished
echo=log.error
NameError: global name 'log' is not defined
Update translations