Solve the problem mentioned in Issue #116.

In that issue, Mr. Yuvi Panda stated that some of the language autonyms listed is written in Latin (but actually they are all in English), not in the respective language. I am here to do something in order to solve the problem.
Fix a minor error in the Mongolian Cyrillic IME

If we use a genuine Mongolian Cyrillic keyboard, when we press on the button "'", the outcome should be "п".
But in this IME, the actual outcome is "'". However, when we press on the button "\" by using the IME, the outcome is "п".
(It should be "\".) I'm doing this to fix the errors.
Merge pull request #118 from springrollconan/master

Solve the problem #116 and fix a minor error in the Mongolian Cyrillic IME