added drush make file for webedit. pulls down ckeditor libs.

fixes #2.

@erykmynn and @Quevin, i only took the CKEditor libraries and the webspan fix plugin out of the install profile's make file and put it here.

Anything else we should move?

https://github.com/ucsf-drupal/ucsf_installprofile/blob/7.x-1.1/make/drupal-org-dev.make#L330