PEP8 + small fixes to time expressions, templates

Google search results now parsed correctly in 24-hour format
(so that 2:06pm will not become 02:06 on the output).

A few punctuation fixes in NLG templates, too.
PEP8, more time expressions are understood now.
Bugfixes
Typo
Merge pull request #1 from UFAL-DSG/ptics_time_fixes

It looks to me fine ;-) I collides some of my changes in the ptics_slu branch. As a result, I will have to merge this to my branch and do testing there.