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 trim zero padding to remove zeros from e.g. 2:00 am > 2 am.
Fix trim zero of military hour from using 12 hr time.