Add support for byhour and byminute (HH:MM) text parsing for daily

[dan-kez]

Added functionality:

• Support at HH:MM where minutes are optional for the daily case

'Every day at 9:10' =>  'RRULE:FREQ=DAILY;BYHOUR=9;BYMINUTE=10'
'Every day at 23:00, 23:30, 9:00 and 9:30' =>  'RRULE:FREQ=DAILY;BYHOUR=23,9;BYMINUTE=0,30'

This partially solves #387. While this issue is primarily about the monthly & weekly cases the same issue persists with the daily case.

I plan on having a subsequent PR that will make this applicable for byweekly and monthly assuming the minute parsing is accepted.|

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[dan-kez]

Looking at #388 - their implementation is much better and should be taken instead of this PR.