* clarification

### Update FAQ
* added key image information (double spend protection)
* clarified Pedersen commitment information

Text modified from [this](https://www.reddit.com/r/Monero/comments/6wi512/how_can_a_third_party_verify_my_transaction/dm89e8g/) Reddit comment from @knaccc.

Text from [here](https://www.reddit.com/r/Monero/comments/6wi512/how_can_a_third_party_verify_my_transaction/dm89e8g/).

Remove reference to Telegram

Use absolute units with background-position

Create tail emission Moneropedia entry

Add #monero-research-lab to IRC channel list

Add Njalla

Update FAQ

Update merchants.yml

Change my name

Add SilverRound.com to merchants list.

Docs: add contributing guide and C4 with C4 addendum

Update smart mining

New User Guide - Restore from Keys

Update merchants.yml

Adding user guide: mining with docker and xmrig

Fix 'Open Sans' @font-face declaration

Update _strings_en.yml

Update people.md (Fluffypony Twitter Handle)

Logs for the Kovri and Dev meetings held on 2017-07-09, 2017-07-23, & 2017-08-06

First revision of pool mining user guide

Fix #343

Fix #106