Исправил ошибку Cannot read property '$navThumbFrame' of undefined

Часто возникает при загрузке/изменении коллекции из-за чего коллекции могут перемешиваться, пропадать фотки и проч.
Better split for swipe and click
Better events management (should fix #67)
skip `.off(keydownLocal)`
(`optionsToLowerCase()`)
(opts.opts → opts)
(Minor fixes)
Fix quirks mode a bit
Fix Retina® artifacts
Change the order of vars declaration, try to fix #60
Fix bug that broke the fullscreen mode for the fotorama in a block with a max-width property #62
Merge pull request #58 from tamtakoe/patch-1

Исправил ошибку Cannot read property '$navThumbFrame' of undefined
Merge branch 'master' of https://github.com/artpolikarpov/fotorama into develop
(`dataFrame !== undefined` → `dataFrame`)
(Lowercase Frame data object)
Better fade: no blink after fast-fast clicks
(Minor)
(Abstract `getRatio()`, dataFrame.thumbratio, fix specs)
(4.3.2)
Fix bug with undefined thumb aspect ratio on html frames, #72