Add \n in LOG_XXX macros
Remove trailing newline in log
Add toPreeditBufIndex
Fix AutoLearnPhrase

AutoLearnPhrase will try to connect single word phrase into a new phrase
and store it into userphrase database. However, due to different index
system between phoneSeq and preeditBuf, AutoLearnPhrase need to
carefully handle index translation.

Closed #112
Remove verbose log