first day ow week is now the calendars correct first day of week
fixed a warning
MNCalendarView.calendar is now readonly
added the current calendar to the mix
fixed the first visible day of month
fixed last visible day of month
fixed calendar border drawing
added some helpers
deleted MN_YEAR
removed MN_WEEK constant
removed all duration constants
Merge pull request #1 from 343max/firstDayOfWeek

first day of week is now the calendars correct first day of week (courtesy of 343max)