update dependencies
Merge branch 'master' of https://github.com/Leaflet/Leaflet

* 'master' of https://github.com/Leaflet/Leaflet:
  Fixing long line
  Adding bounceAtZoomLimits option
  The drag click avoid hack is needed for touch zooms on ie10 also, when releasing your fingers after a touch zoom click events are generated. Fixes #2094
  Remove leftover code from the draggable/tap cleanup. Fixes #2103
  Changed main module file to use un-minified version.
  adding alt tag to marker icons
  Fixing line too long error
  Do not scale above minzoom and maxzoom in touch zoom action