Enable app frame with inline menu and window controls. See #176
Remove left-side border in light seed.less so that you can Fitt's Law the collapsed project panel.
Added minimum window bounds.
Fix a bug where fullscreen can still be 'maximized' before it returns to windowed mode.
First tweaks for appearance on Windows.
Adjustments based on Chrome OS.
Didn't care for that tab tweak after all.
Adjust minimize button text

The bar is a little thick compared to the +, and with the new tilde joke
close, it's not unbalanced to just use a dash.
.
Move menus out, add command line styles.
Add a debug command line for issuing Caret commands.

Fixes #145.
Enable immersive fullscreen option. Fixes #179
Change tab glyph to a lighter, empty circle.
Forgot a closing paren.
Check file modification on app:exit

Prompts for save/discard/cancel when user triggers an app:exit via menu,
button, or palette. Fixes #178.
Fixes for immersive fullscreen on ChromeOS
Added a check for fullscreen on startup
Actually add .markdown to extensions, bump manifest.
What the hell, let's go to 1.4