Increase size of attachment input

Customer reported usability issue: selected file name is displayed very
shortened, thus being hard to check.
Add needed dependencies. At least on my system.
Merge pull request #16 from wbiker/master

Add needed dependencies. At least on my system.
Merge branch 'master' of github.com:CiderWebmail/CiderWebmail

Conflicts:
	root/static/css/mail/new.css