Update .gitignore
Add readme files.
Add common.pri
Add log pattern with tests.
Add log message.
Update pattern for log messages.
Add abstract appender and console appender.
Add config reader.
Add log manager. Add log category.
Add logger.
Add null appender.
Add tracer.
Add logger.pri
Update pattern test.
Add file appender.
Qt4 compability.
Fix default pattern. Fix default category.
Fix file appender.
Add compability with compilers that do not support C++11.
Rename build target and .pri file to 'nestorthelogger'.