Dates with custom color

Added support to set custom colors to other dates.
FIX: Wrong days in month

Fixing the bug that caused the days from the previous and next mont to
display.
Fix permissions back to 644
Remove otherDate attribute in Cell
Remove otherDates array and only ask delegate
Avoid useless call to delegate in prepareForReuse
Merge pull request #8 from jivesoftware/develop

Ask the delegate for Dates with Custom Colors