Add a `make` file and documentation.
Remove redundant url check

It's now handled in the input field.
Move subsequent query call to beginQueue
Create styles for hover table rows.
Allow getting html errors via the api
add the htmlValidatorURL as a configurable option
remove an empty function
Remove unused loggers
Rename the validation logger

to `HTMLValidationLogger` to better reflect what validation it is logging
Remove the use of an old logger
Remove an old and unused file
Merge pull request #13 from mfairchild365/master

Allow getting html errors via the api
Update db to include accessibility_errors

* change `valid` to `html_errors`
* add `accessibility_errors`
update keys
add a script to install the db
add an accessibility logger

Note -- still testing
Add accessibility to json output
default to 'unknown' if error
Add bad links to render template.
remove `code` and `site_id`

They are unused