Revert "* Modified the keyword density and image alt attribute rules to search...

Revert "* Modified the keyword density and image alt attribute rules to search all long-text fields, not just the body, and in the case of the alt attribute rule, to also search image fields as well as images inserted into text. * Both also search fields contained within Field Collections. * Also added two helper functions to seo_checker.module which are used in the above rules, and fixed a number of typos in help text, descriptions, etc."

This reverts commit f9ebf5a8.