Logger 3.0.0: Better Documentation Navigation

As Logger's documentation continues to expand, the navigation has become a bit unusable. This is primarily because of the limits of Markdown and the size of the documentation.

Thankfully they're additional tools to help improve Markdown documents. One tool that we found really useful is called Flatdoc. The main advantage of reading Logger's documentation with Flatdoc is that it provides a nice tree navigation, similar to Oracle's documentation. It also does not require any change to the existing documentation. You can either read to documentation in Markdown format (directly on Github) or click on the Flatdoc link now found in most of the documents.