noted ImageMagick requirements in README and home debug info, closes #1
added sticky footer
Implemented first version of e-mail sharing
Cleanup
updated settings.php.default with share info
added app/Config/email.php to .gitignore
formatting
fixed check for available share links
Merge branch 'share-email'

Conflicts:
	app/webroot/css/stylesheets/bootstrap.css
formatting
added file size to dropdown download links
Merge branch 'share-email'