Wikit: programmable hardware with flowchart

We enable a new feature to import arduino code into wikit.

Currently for arduino class, it ONLY support simple class with simple extension relation with base class

2015/6 -- 2015/9 first wikit prototyping with limited function. (GPIO/I2C only in FPGA side and basic data flow without grouping funcion in software side) -- Done

2015/9 -- 2015/11 Update app UI and design feature based on market feedback -- On track

2015/11 -- 2015/12 launch crowding funding

2016/1 -- 2016/3 release first wikit edition with full function to early bird. (NOT BUG FREE). Keep hardware module support in app side

2016/4 -- 2016/6 fix all the bugs and shipping the products