Version 2.1.8

This version fixes a long-standing bug that caused all Epichrome apps to run without hardware graphics acceleration due to the GPU process crashing on startup. This could cause sluggish graphics response (especially on retina displays) and failures to load WebGL sites.

(Note that it's possible the first time you run your apps or Chrome after updating to 2.1.8, you may have to re-log in to Chrome in each app's settings, and you may also have to re-log in to some or all your websites. Once you've done that, though, your credentials should persist even after you quit the newly-updated apps.)

Big thanks to mhwinkler and jdsimcoe for identifying this bug (in two utterly different forms) and putting in a bunch of time helping isolate it and test approaches to a fix, and to breeden for once again testing the new update before I inflicted it on everyone else.

Note: This is likely to be my last update for a while (except for fixing catastrophic problems like 2.1.7). My day job has gotten very busy, so I probably won't have time to work on new features or major updates for the foreseeable future.