Merge pull request #114 from jeremy-brooks/release-4.0.0

Release 4.0.0
shortened list of bullet points by one
Added official create wallet video
Adjusted main.less to squash up the divs on 1024x768
Added 96x96 px version of logo
updated youtube url
Merge pull request #115 from jeremy-brooks/release-4.0.0

Release 4.0.0
Various tweaks to the main page in response to user feedback
Shortened text on buttons for viewing on mobile devices
Updated the downloads page to PB3
Removed the features menu item
Removed glossary
Harmonised the header sizes across the main sections
matches licence shown to user at first startup
apostrophe tweak
Merge pull request #5 from jim618/release-4.0.0

Release 4.0.0