Merge pull request #12 from SoftwareMarbles/fix-doc-updating-on-save

Fixed incorrect doc updating on save()
Merge pull request #13 from SoftwareMarbles/update-coffee-src

Updated coffeescript source file and compiled nano.js from it
Merge pull request #14 from SoftwareMarbles/fix-filtering-in-all

Fixed filtering in all
Update README.md

Updated README with information on how the adapter works with the underlying db
Fixed all newly failing tests (1 failing, 1 pending as before)
Made map view functions cleaner