Extract arrays.delete() to core/utils
Set the correct module in arrays.remove()
Add arrays.clone() function

It's just array.slice()
Refactor arrays.delete()
Add arrays.isEmpty() function
Merge branch 'master' into extract_array_remove

Conflicts:
	app/localStorage/utils.js
Merge pull request #18 from sebn/extract_array_remove

Extract arrays.delete() to core/utils