Add english language files
Fix typo, remove extra spaces and tabs, escaping, and formatting.

* Typo was the word "summary" in the first paragraph of "The Overview Page".
Merge pull request #125 from lukemcdonald/getting-started

Fix typo, remove extra spaces and tabs, escaping, and formatting.
Standardize non-admin submit input class names.

* Give non-admin buttons a class name of "button".
Merge pull request #128 from lukemcdonald/submit-buttons

Standardize non-admin submit input class names.
Fix bug with not being able to unset settings that are of the type multicheck. Closes #122
Add example of the referral URL in settings
Dashboard template clean up, formatting, and escaping.
Update Dashboard ID and Class names.

* Includes updates to CSS and JS as needed.
Allow affiliates to specify their payment email during registration
Update Login template ID and Class names.

* ID and Class names use dashes for underscores.
* Remove lost password link title. Not needed and duplicates title name on devices with audio assistance.
* White space and formatting.
Merge branch 'master' of https://github.com/affiliatewp/AffiliateWP into id-class-names
Add class to No Access template containing element.
Register template clean up, formatting, and escaping.
Update Login template ID and Class names.
Add payment email to dashboard and rename notification settings to profile settings
Escape attributes in login template.
Update error class name.
Update error class name.
Update selector name.