v0.83.1

Additions

• Added a "Newline Above" command, bound to "cmd-shift-enter" by default.
• Added language detection based on 'shebang' lines in JavaScript, Python, and Ruby files.
• Added tooltips to tabs.

Bug Fixes

• When opening projects with cmd-o or cmd-alt-o, they now open in a new window unless the current window is empty.
• Fixed a bug where clicking the breadcrumbs button would fail to open the outline view after closing the outline view with the Escape key (#1452).