Added minViewMode Option

Added the minViewMode option to set a limit for view mode. 
Accepts: 'days', 'months', 'years', 0 for days, 1 for months and 2 for years.
From latest version of Stefan Petre.
Minor correction on minViewMode
Added minViewMode Option
Remove BOMs
Make starting view mode respect min view mode
Proper data-attr for minViewMode
Update readme for minViewMode; a little consistency, a little clarity
Merge pull request #350 from vanack/master

Added minViewMode Option to set a limit for view mode