Fixed FindBugs warnings in net.maxiebyte.logging package.
Fixed FindBugs warnings in net.maxiebyte.logging.formatters package.
Fixed FindBugs warnings in other packages.

Closes #17.
Added more Javadoc for the classes in the net.maxiebyte.logging package.

The Javadoc tool issues some warnings.
Fixed Javadoc warnings.
Merge branches 'FindBugs' and 'javadoc'