Efficiency improvement
Change utils.loadPathAsGetters() to use glob. Asynchronous initialisation.
Rename loadPathAsGetters() to globGetters()
Add tests for globGetters in nested directories.
Move modules into subdirectories.
Move storage drivers into subdirectories.
Move filesystem storage driver defaults into external file.
Merge pull request #50 from leftclickben/FlexibleFileStructureForGetters

Flexible file structure for getters