Capitalize keywords in email templates according to convention.

email/email-en.tmpl

@@ -6,10 +6,10 @@
 ## Newlines and whitespace are significant!
 ##
 ## These are the email headers
-to: $to
-from: $from
-date: $date
-subject: SABnzbd has <!--#if $status then "completed" else "failed" #--> job $name
+To: $to
+From: $from
+Date: $date
+Subject: SABnzbd has <!--#if $status then "completed" else "failed" #--> job $name
 X-priority: 5
 X-MS-priority: 5
 ## After this comes the body, the empty line is required!

email/rss-en.tmpl

@@ -6,10 +6,10 @@
 ## Newlines and whitespace are significant!
 ##
 ## These are the email headers
-to: $to
-from: $from
-date: $date
-subject: SABnzbd has added $amount jobs to the queue
+To: $to
+From: $from
+Date: $date
+Subject: SABnzbd has added $amount jobs to the queue
 X-priority: 5
 X-MS-priority: 5
 ## After this comes the body, the empty line is required!