- Moved technical specs out of 'Resources' and into root

Sorry for throwing everything into one commit, splitting my changes
to individual will probably take ages.

* fixed filename so it can be rendered to HTML

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.