add and document the .get(id) method
add and document .count() method
add and document the .toArray() method
Merge branch 'refs/heads/add-count' into patches
Merge branch 'refs/heads/add-get' into patches

Conflicts:
	README.md
	index.js
Merge branch 'refs/heads/add-toarray' into patches

Conflicts:
	README.md
	index.js