slide no longer ignores speed parameter
slide no longer ignores speed parameter

Fixes #180.

Mexiswow/Swipe,wklc2015/Swipe-1,thebird/Swipe,mengqing723/Swipe,arcxyz/swipe-add-partial,jonnywyatt/Swipe,suniaoo/scale-swipe,GerHobbelt/Swipe,iwanttotellyou/Swipe,jinlong/Swipe,huzion/Swipe,nickleefly/swipe,iwanttotellyou/Swipe,leeleo26/Swipe,srjkv13/Swipe,srjkv13/Swipe,yizhicheng/Swipe,voronianski/swipe-js-iso,GerHobbelt/Swipe,fancyboynet/Swipe,lyfeyaj/swipe,DemocraciaEnRed/swipe,prashen/Swipe,leeleo26/Swipe,miaotmac/swipe,tilfab/Swipe,jinlong/Swipe,eonezhang/Swipe,fancyboynet/Swipe,Luobata/Swipe-,krisdigital/Swipe,loup-brun/swipe,thebird/Swipe,d5-css/Swipe,eonezhang/Swipe,rmoszczynski/Swipe,lyfeyaj/swipe,yizhicheng/Swipe,zycFran/Swipe,krisdigital/Swipe,d5-css/Swipe,mengqing723/Swipe,EugenAz/swipe,nickleefly/swipe,huzion/Swipe,zycFran/Swipe,houyulei/Swipe,tilfab/Swipe,wklc2015/Swipe-1,suniaoo/scale-swipe,prashen/Swipe,DemocraciaEnRed/swipe,Mexiswow/Swipe,jonnywyatt/Swipe,micheledurante/Swipe,arcxyz/swipe-add-partial,miaotmac/swipe,voronianski/swipe-js-iso,EugenAz/swipe,loup-brun/swipe