next/back navigation

Signed-off-by: Ruben Mendez <ruben.mendez@gmail.com>
adjust collectionView to have a concrete size

Signed-off-by: Ruben Mendez <ruben.mendez@gmail.com>
scroll to next/previous section using scrollToIndexPath

Signed-off-by: Ruben Mendez <ruben.mendez@gmail.com>
right pagination

Signed-off-by: Ruben Mendez <ruben.mendez@gmail.com>
Merge branch 'Development' of https://github.com/minube/MNBDatePicker into features/navigation

Signed-off-by: Ruben Mendez <ruben.mendez@gmail.com>

Conflicts:
	MNDatePicker/MNDatePicker/MNBViewController.m
Merge pull request #4 from minube/features/navigation

Features/navigation