Merge pull request #6 from jsakamoto/fix/print-not-work-on-chrome

Fix: Printing dose not work on Google Chrome.
Merge pull request #5 from jsakamoto/feature/mobiledevice

Support for mobile device and touch-ready OS such as iPhone/iPad/Android/Windows8
Add 'go to page' feature.
- Hash of URL indicate current slide index, and when hash of URL changed then show the slide which specified by hash.
- 'Slide n of m' change from static text to drop down list.
- PowerPoint compatible keyboard shortcut: press some numeric key and enter, for example, '2','1',[Enter], then show the slide page 21.