Fix for ruby bug when using 地 in sentences and config bug

[jay-pee]

In the comment at #134 I expanded a bit on the problem.

You can see that the word separation is wrong: 地问 (dewen) is written as one word. (or is it correct?)
Maybe the separation has to be improved...

[jay-pee]

Added a solution for issue #127

Sorry this was kind of automatically added to the older PR. Should have reset my git repo to the original state and then submit a new PR.

[jay-pee]

I overlooked some use of the deleted class, which now leads to errors. Have to investigate further.

[jay-pee]

Had to reintroduce config.py so the function get_fields() is available again. But it is now much shorter since a lot of the old functionality could be replaced by inheriting from defaultdict.

[khonkhortisan]

In case no one saw this: in that screenshot, Color blue 说 shows as Pinyin blue shuì and Bopomofo red ㄕㄨㄛ (shuō) instead of blue ㄕㄨㄟˋ (shuì). I'm interested in what the Ruby (Bopomofo) field looks like, whether 说 is in red-on-blue or just one color.