Check to make sure the currentSection isn't undefined.
Merge pull request #748 from ajgagnon/master

Added additional afterReBuild callback for reBuild methods.
- Added afterRebuild #748
- Solved problem with normalScrollElements for mobile phone. #751
Merge pull request #731 from heddle317/master

Check to make sure the currentSection isn't undefined.
- Solved problem scrolling up when using `autoScrolling:false`. #752, #731
- Deleted event over `.toSlide`.
Solved setTimeout error #765
Check length of the scrolledSections array before taking first element.

In the previous version there was check if first element defined or not.  @alvarotrigo noted (https://github.com/alvarotrigo/fullPage.js/pull/731#issuecomment-56633395) that checking array length looks like better solution and I agree :).

fixes #731, #752
Merge pull request #771 from tkirill/master

Check length of the scrolledSections array before taking first element.
- Solved problem with duplicate callbacks when using autoScrolling:false #759
- Added new option `fitSection` when autoScrolling:false to snap when the scrolling stops #647
- Improved URL change when using autoScrolling:false #752 #731 #771
Update Readme.MD - Remove Unnecessary (')

The apostrophe in '2' confuses other users whether it is a string or an integer.
Merge pull request #776 from cary1234/patch-1

Update Readme.MD - Remove Unnecessary (')
- Solved problem with menu when using autoScrolling:false
Fixed issue with fitSections and multiple callbacks to onLeave