Setvar attachfile for new install
Added default_adminformat and default_userformat config variables
Added show_userformat config variable
Added <base> tag in header section for html emails teplates
Correct attachment file name, according to manipulations in sendtoContact method
Proper hendling for modifier nl2br used in html emails
Tab to spaces
Merge pull request #49 from nmpetkov/patch-2

Customizations to email format type and HTML mails