Radical data

[chanind]

This PR pulls in radical data from Make Me a Hanzi, so that users can color the radical in a character differently if they wish. Users can set this color by passing radicalColor when creating a HanziWriter instance. While updating the data, the character field was removed to reduce the size of the data files since it's redundant and is not being used anyway.

closes #11

[fzzylogic]

Updated an old stackexchange post to reflect fantastic recent developments.

[chanind]

Glad to hear it! Thanks for keeping that post up to date!

[enjalot]

This is really cool, but I couldn't figure out how the radStrokes were defined (I don't see the corresponding data in makemeahanzi?).
I found some characters that are missing and was thinking about how to contribute them, but it would be good to know how the data here was derived.

[chanind]

They come from the dictionary.txt file in make me a hanzi. The script which imports them into hanzi writer is here: https://github.com/chanind/hanzi-writer-data/blob/master/stroke_data_parser.py