Merge pull request #405 from trigun0x2/staging

Deck show styling and spec fixes
enabled email notification for mailboxer
Added spring to guard
New email notification layout
Added Piwik tracking code
Removed Piwik
* Removed Piwik from Wel#index and ga.js
* Changed notification email for hardcode profile link
fixed according to hound style [skip ci]
Merge pull request #406 from trigun0x2/notifications

Notifications
added translations for mailboxer subject
Allow users to opt of our emails
fixed user model email
fixed notification email logo pic
Merge pull request #407 from trigun0x2/opt-out_emails

Opt out emails
fixed email profile ur
fixed notification path
Improve Deck submit
* prevent users from editing tournament decks
* improve deck submist
 * deck select counter
 * prevent users from selecting additional decks
do nothing is message already read
removed check for match submitted deck class to create new deck
Added deck merging
* Moved decklist to a slim file
* Users can now select two or more decks to merge stats into one deck
Merge pull request #408 from trigun0x2/staging

Added merging of decks
Polished Tournament features
* bracket display
* UI for tournament admin (user removal)
* fixed bug with bracket generation (import gem)
merge with master