Code cleanup

This patch just fixes the numerous spacing issues in this module.

• It leaves the user docs in README.txt and moves the rest to CHANGELOG.txt
• It removes all the tabs
• It removes all trailing spaces from the end of lines.
• It makes the indentation conistent.
• It removes the un-recommended VERSION from the .info files.
• It uses single quotes instead of double quotes where it makes sense.
• It uses double quotes to prevent escaping single quotes.
• It removes some backticks (`) from some SQL queries. Drupal core doesn't use them. (And neither does Drupal core have spaces in SQL column names; but that will have to wait for another patch.)