[FIX] Fix sending mails even though diabled

Fixes #732
Merge pull request #733 from TheSerapher/issue-732

[FIX] Fix sending mails even though diabled
[FIX] Removed uneeded shares data
[FIX] Fixed issues with uncached user shares data
[FIX] Fix donors, missing closing th tag
[IMPROVED] Show usernames in contrib lists if admin

Addresses #737
[FIX] Added admin check to all templates

Fixes #737
Merge pull request #741 from TheSerapher/issue-737

Issue 737
Merge pull request #3 from TheSerapher/next

next