Fixed the following issues:
1. entering sick or vacation time adds to the totals at the bottom. Should subtract from end balance.
2. daily totals do not include hours worked field
3. Enter an invalid value, such as "1".  Tab.  Get error message and submit is disabled.  However, if you correct the value to 1:00 and tab off field, the 'Resolve exceptions...' error message remains and submit is still disabled.
4.  On row with hours worked of 4:10, entering "20:00" does properly display 'You can not enter hours which exceed daily total more than 24 hours'.  Change value to 19:00.  Field is no longer red, but 'Resolve exceptions or see your time manager' displays at top.

Also added additional functionality for formatting numbers.
Examples:
:30 -> 0:30
0:30 -> no change
00:30 -> 0:30
:75 -> 1:15
12:89 -> 13:29