Adding a filter option to read operations, defaults to the identity function.
Updating the README with instructions on filtering read operations
Update README.md

Added common example of using arrays (for people who skim)
Merge pull request #17 from ProLoser/patch-1

Update README.md
Simplified logic, adjusted order, and added more options
Merge remote-tracking branch 'jamesspencer/add-read-filter-option'

* jamesspencer/add-read-filter-option:
  Updating the README with instructions on filtering read operations
  Adding a filter option to read operations, defaults to the identity function.

Conflicts:
	README.md
	tasks/dom_munger.js