Added a limitations section
Added a limitations section

CooperRS/RMDateSelectionViewController,nickoneill/RMDateSelectionViewController,jiamaozheng/RMDateSelectionViewController,sproutsocial/RMDateSelectionViewController,AlexanderMazaletskiy/RMDateSelectionViewController,sandyway/RMDateSelectionViewController,sproutsocial/RMDateSelectionViewController,i-miss-you/RMDateSelectionViewController,scottphc/RMDateSelectionViewController,kevin-hirsch/RMDateSelectionViewController,CooperRS/RMDateSelectionViewController,zilaiyedaren/RMDateSelectionViewController,lijie121210/RMDateSelectionViewController,robertibiris/RMDateSelectionViewController