* remove 2 ebook of [Linkers and Loaders], [Learn Python The Hard Way]. ref issue:#3091, #3062
* Add CONTRIBUTING file of chinese version.
* Format text, update some description
* translate contribution md file.
* Add open Issue ref link
* Update some description in CONTRIBUTING And CONTRIBUTING-zh file.
* Update some description of zh version CONTRIBUTING.
* format md code to pass Travis CI check
* Fix The Travis CI check issue
* Fix The Travis CI check issue
* Fix The Travis CI check issue
* format md file to pass TCI check.
