v2.6.0_stable

• add PrePushLog
• better performance when log is filter out.
• interface replace std::string because it's in shared library is unsafe.
• add log level 'trace'

v2.5.0_stable

• screen output can choice synchronous or not
• fix sometimes color will disorder on windows.
• eliminate some compiler warning
• fix sem_timewait in linux
• add format-style method at input log, cannot support vs2003 and VC6.
• fix WCHAR String cannot output
• optimize std::string, binary log input, and support std::wstring.
• clean code, better readability

v2.4.0_stable

• support rolling log file.
• support hot update configure
• used precision time in log.
• micro set default logger attribute
• fix tls bug in windows xp dll