Module calls now accept `classes` instead of `htmlClasses`.
Update Readme.
Update less 1.5.0 --> 1.6.3 / assemble-less 0.5.3 --> 0.7.0. Disable `imports:reference`, I can't get it to work in this version.
Fix missing digit in text-shadow
Add staticBaseUri to config-project.less
Latest changes from such.less