Added "Reply-To" header to email

Added simple verification for cases where no sender name or email are set.
Changed sender email field max length

It should be 254 (http://stackoverflow.com/questions/386294/what-is-the-maximum-length-of-a-valid-email-address), but that seems improbable.. so I would go with 50 chars max, instead of 20 that cuts 4 out of 10 emails I receive.
Merge pull request #858 from nicoschtein/patch-10

Changed sender email field max length
Merge pull request #854 from TheSerapher/issue-853

Issue 853
[FIX] Backport from #855
[FIX Blockfinder Stats] Working with public and private settings
Update default.tpl

No reason max width should be less then 100. Quick fix.
[FIX] Idle Worker Notifiaction reset
Merge pull request #862 from WKNiGHT-/patch-7

Update default.tpl
Merge pull request #861 from iAmShorty/blockfinder-update

[FIX Blockfinder Stats] Working with public and private settings
[IMPROVE] More verbose logs on addBlock errors
Merge branch 'next' of https://github.com/TheSerapher/php-mpos into next
Merge pull request #857 from nicoschtein/patch-9

Added "Reply-To" header to email
Implement Templates admin page

Create `templates` table in database
Add navigation links to Template page
Let admin to manage his templates from adminpanel
Make Smarty search template in database first

If not, fallback to file template