1.Fix appenders manager synchronize problem.
2.Fix check whether current is debug or info problem.
3.Fix multiply separate char in the same line in properties files.
4.Fix kernel log check environment error.
5.Fix AndroidAppender attribute 'layer' is invalid.
6.Fix some problem when log null message.
7.Fix occur some problem when add, remove, get appender asynchronously.
8.Add interface for getting or removing appender.
9.Add support separate char ':' in properties.