Merge pull request #29 from ariutta/master

merge in changes from master
Merge branch 'gh-pages' of github.com:ariutta/svg-pan-zoom into gh-pages
Merge branch 'master' into gh-pages
Merge branch 'master' into gh-pages
Add option and API for enabling and disabling zoom on double click. Closes #53. Closes #54
Remove drag possibility. Closes #40
Disable ability to pan using second click from a double click
Fixes pan using touch events. Fixes #47
Support MagitTouch.js events
Enable control icons on touch devices. Related #47
Add double tap support. Related #47
add wikipathways demo to demo folder
Merge branch 'master' of github.com:ariutta/svg-pan-zoom
build
Need to use http://www.w3.org/2000/xmlns/ when setting xmlns:ev and xmlns:ev attributes
merge changes from bumbu and bump version
Merge branch 'master' into gh-pages