If you're upgrading from 7.x-2.0-beta1:
Edit your existing app-settings.css.less. The LESS variable @themeDirectory is now a path, not only the theme directory. See difference of the new app-settings.css.less on this version and your existing file.
A new font is introduced from this release, and the old fonts are now deprecated.
Please see http://groundwork.noceda.me/docs/changelog for full list of changes.
Commit 8875b68 Small final edits before a release
Commit 9242bc4 Numerous changes mostly on the change of the @themeDirectory LESS variable
Commit c261f33 Fixed Gwikons & docs links, added a mixin, modified wrong selectors,
Commit 2d30f2f Issue by ricmel111: Fixed media-query support in IE8.
Commit 7f9107c Replaced the fonts. Added gwikons feature.
Commit 77c7eab Modified color variables and heading margins