implement message delete (as move to Trash)
style delete action on right of message
fix deletion handler, stop propagation, try to add animation
replace animate with simpler slideUp animation
use slideDown instead of fadeIn for animation when opening mail
add bottom padding so it’s clear it’s the end of the list
Merge pull request #75 from owncloud/delete-message

implement message delete (as move to Trash)
- adding icons for download anf save to files
- show human file size
design improvements for attachments
adding id and mime to attachments

Conflicts:
	js/mail.js
	templates/index.php
different templates for single and multiple attachments