Spring cleaning
Created by: rehrar
Several fixes across the entire site, including but not limited to:
- Modified post layout to include correct date formatting and removed hard coded dates from all blog posts to date
- Added Press Kit page and appropriate images, ai files, and an all-inclusive zip folder
- Added Mattermost and Taiga to Hangouts
- Updated Events
- Fixed #411 (closed)
- Fixed #408 (closed) (but was fixed before I got this out)
- Fixed #306 (closed)
- Reverted color of Merchants to gray. Do not change to orange!
- Added info about recent hardware wallet updates to Downloads page
- Updated README and subsequent General Web User Guide