various documentation/spelling fixes
add Chinese Evernote (Yinxiang) endpoint
refactor EvernoteApi getting rid of duplicate code
Merge pull request #476 from norbertpotocki/documentation-fixes

various documentation/spelling fixes
Merge pull request #477 from norbertpotocki/evernote-extended-api

Add support for Chinese Evernote endpoint and refactor EvernoteApi