Merging dev branch 3.0.4

[alvarotrigo]

• Fixed bug: data-anchor attributes stayed in DOM on destroy('all')
• Fixed bug: scrollOverflow causing maximum call stack size exceeded in certain casesreact-fullpage/38
• Fixed bug: initialisation fails with jQuery adapter using a class Fullpage V3 doesn't initiate if using a class for the wrapper element #3433
• Fixed bug: loss attached events on unwrapping Bugfix: loss attached events on unwrapping #3436 thanks to @Khusainov
• Fixed bug: Uncaught ReferenceError: fullpage is not defined vue-fullpage.js/#60 thanks to @splex7
• Fixed bug: destroy('all') showing error when scrollOverflow file present but not used
• Fixed bug: direction is undefined in afterLoad Event Direction on afterLoad Event Undefined #3480
• Fixed bug: isLast never true in afterSlideLoad & onSlideLeave callbacks when having multiple sections with slides "isLast" is never true in afterSlideLoad and onSlideLeave callbacks when there are multiple sections with slides on the page #3471 thanks to @i22tha
• Fixed bug: setAllowScrolling not working in afterLoad setAllowScrolling not working as expected upon page load in afterLoad #3490
• Fixed bug: wrong sizes when using paddingTop & scrollOverflow & verticalCentered Padding Issue with ScrollOverflow #3335 Vertical Align Middle Alignment Issue on Scroll Overflow with Padding Top #3484
• Ajax jQuery stops working after resizing the screen two times. Ajax jQuery stops working after resizing the screen two times. #3440
• Fixed bug: normalScrollElements requires a 1st touch in touch screens normalScrollElements requires a 1st touch in touch screens #3481
• Fixed bug: Fancybox with scroll doesn't work Fancybox with scroll doesn't work #3435 normalScrollElements requires a 1st touch in touch screens #3481
• Fixed bug: OrientationChange on Slides breaks Layout on Chrome (mobile) OrientationChange on Slides breaks Layout on Chrome (mobile) #3336
• Improved: now it is possible to use a menu without using anchors Menu without using anchors #2755
• Improved: internal function deepExtend
• Improved: removed jQuery dependency in package.json
• Documentation: fixed broken link for iScroll docs Broken link on documentation #3489 thanks to @bott1222
• Documentation: fixing broken link & format typos in different languages Fix for issue #3489: Broken link on documentation #3494 Broken link on documentation #3489
• Documentation: fixing broken links to fp-auto-height-responsive demo Link to fp-auto-height-responsive demo in documentation is broken  #3483
• Documentation: added a new sponsor: Codefirst
• Documentation: added link to new Angular wrapper angular-fullpage.