Initiate a Chinese translation project of scikit-learn

Hi I am starting a project to translate the scikit-learn documentation into Chinese.  I am not sure whether it is necessary to add it into the current package.  However it would be nice to help other people who want the translation or draw people to help the translation through your platform :)

Also I edited two files for minor corrections as listed below:
doc/modules/svm.rst  - typo, change lower indices from 1 to 2 
examples/cross_decomposition/plot_compare_cross_decomposition.py - add y.shape=(n,1) to fix the script.

Jiayi Liu