* Step 1: move electorn into `app/`.
This is to comply with the suggested directory format of
`electron-builder`: https://github.com/electron-userland/electron-builder#two-packagejson-structure
* Step 2: add build directory with icon files for mac / windows
* Step 3: move all development (web) assets into main directory
* Step 4: add `build` namespace to dev `package.json`
* Step 5: move all dev dependencies into dev file and get rid of
old electron packagers in favor of `eletorn-builder`
* Step 6: target build inside `app/` as everything else is excluded at build time
* Step 7: remove old stuff!
* Step 8: update README
* turn off asar for `child_pty`
* Dynamically change the `font-smoothing` pref
By default, hterm defaults to `font-smoothing: 'antialiased'`, which
works really well on retina displays. On non-retina displays, however,
the type looks very thin and is hard to read.
This will look at the devicePixelRatio of the device anytime the term
prefs are set, and change between `antialiased` and
`subpixel-antialiased` dynamically.
* Refactor to add the font smoothing override into state
This also subscribes to the electron `move` event to control when this
piece of state gets updated.
* Add UI_WINDOW_MOVE action with a side effect for font smoothing
