Implementing the back-end of the Language bar... JIRA issue: CORE-19361 - Add mlng.cpp and mlng.h. - Modify msctf.spec. - Implement MLNGINFO structure and CStaticIconList class. - Implement TF_InitMlngInfo, TF_MlngInfoCount, TF_InatExtractIcon, TF_GetMlngIconIndex, and TF_GetMlngHKL functions.