remove trailing whitespace
bump tested up to to 4.0.0
fix indentation in CSS
Fix #210 "Checkboxes in Guest Author Profile require double-specifying checkbox type"
Fix errors found by PHP CodeSniffer in co-authors-plus.php
Fix errors found by PHP CodeSniffer in class-coauthors-guest-authors.php
Merge branch 'master' of github.com:paulschreiber/Co-Authors-Plus

Conflicts:
	php/class-coauthors-guest-authors.php