Single Page Account Settings [MJ-840]

All Tests Pass

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Whats been removed:
* Removed backbone, ajax calls to different templates
* Removed unused templates
* Removed urls associated to different sections (edit_password, edit_communication)
* Removed ajax validation
* Removed views that were doing validation
* Removed EditAccountForm and associated tests

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Whats been added/changed:
* Single page for all Account Setting options
* Single view for form POST calls
* Fixed form-error-highlight to correctly display form errors
* Rather than using different urls to show a specific section onload use an ID selector with url
  * Example: {% url 'edit_account' %}#as-password  (account settings-section you want to show)
* loading modal javascript files only happens once
* Accordion effect when switching sections