0.15.0 Release

• POTENTIALLY BREAKING CHANGE: Modified the way the GUI elements are constructed internally. If you're modifying the internals in your CSS, make sure everything looks right!
• Made menu bar visible in fullscreen
• If panelMode is outer, the menu will become inner when fullscreen
• Introduced .guify-fullscreen CSS class that attaches to the root when fullscreen is enabled
• Fixed up barMode = "none" behavior to match docs
• Added panelOverflowBehavior parameter to GUI opts, which lets you make the panel scrollable if it grows beyond the edge of the container.
• Fixed brief display of incorrect value when initializing range and display
• Added a bit of top margin for title components
• Fixed styling issues on Safari iOS for text, range, and checkbox
• Fixed incorrect font use on Safari iOS.
• Added an inputFontFamily param to theme objects, allowing a secondary font just for input fields
• If you provide your own font URL to the theme object, the default "Hack" font won't be downloaded
• Made range and interval components respect precision more closely. precision now affects the value itself, meaning the value and its display will always match.
• Fixed a bug in interval components with a log scale, wherein setting the value text would cause the wrong value to be used