Update conventions

Changes are:
- Close method header on same line as last argument
- Require new lines at the end of files
    
    This mostly fixes the problem with an empty _config.php with just "<?php" (no newline) outputting the <?php
- Use successive capitals for acronyms in classnames
- Use columns for line length over characters
    
    This removes the confusion over a tab (one character) taking up four spaces.


This makes the conventions copied from Zend more closely match the current code.