Add network logos

* Add Discovery Network International/A&E Network International/Scripps
Networks International missing channel logos
Merge pull request #122 from Supremicus/feature/MoreNetworkLogos

Add network logos
Add lowercase PM to the General Config/Interface/Time style selection.

Change re-factor sbdatetime classes.
Add param "markup" to sbdatetime.sbftime() and sbdatetime.sbfdatetime() that when set True will return time dimensions HTML class wrapped.
Add HTML class wrapping to the dimension parser of fuzzy time.
Change General Config/Interface/Trim zero padding to Trim date and time, now handles 2:00 pm > 2 pm.
Fix trim zero of military time hour to not use 12 hr time.
Merge pull request #121 from JackDandy/feature/AddTimeFormatLowerPM

Add lowercase PM to the General Config/Interface/Time style selection.
Fix typo in menu item Manage/Update XBMC.
Merge pull request #120 from MindTooth/feature/FixMenuUpdateXBMC
Merge branch 'release/0.5.0' into develop