Merge pull request #72 from caasi/master

support offline strokes
* Online version uses ./json/, not stroke-json.moedict.tw
* Add ./bin/ to assets.
* Beginning of radical index
* Android<4 has no ArrayBuffer; fallback to online json
* Working new Cordova build, still need to tweak menu scrolling and radicals
* Add special2pack.pl step to make offline
* Radical index.
* Mandarin radical data files.
* Finish radical index
* Misc layout fixes