Alpha 0.0.2

Context menu, edit and resend etc.
Only 64-bit Windows this time, sorry! I need to get a proper build system in place for Linux and Mac OS etc. instead of doing it manually.
Again:

There are lots of bugs and half-complete features, but here's a pre-built version if you don't have node installed.
I can't work out how to build for Linux, though, so you'll have to run it on Linux manually with npm start