1.5.0-dev1

New features

• Website is encoded as a gzipped byte array as a part of the build borrowing methodology outlined by Xose Pérez here.
• Add PROGMEM in a few places.
• Check for updates by directly contacting the GitHub API from the UI using a CORS AJAX request rather than proxying through the ESP. This removes the SSL dependency.
• Remove unnecessary GithubClient code.
• Add more information in the /about route.

Bug fixes / improvements

• RF24 was clobbering PROGMEM macros, and a bunch of invalid usages ensued. These have been fixed.