+ fixes #0001356: Error message displays value in Radians (adding reduntant/conflicting angle constraint)
Merge branch 'master' of ssh://git.code.sf.net/p/free-cad/code
+ fixes #0001330: Cannot link edge to external geometry
Start: Improvements to the Start page - relates to #1017

* Removed the videos section
* Added descriptions for feed links
* New cleaner look
* Colors taken from the system
* Feed links open in an external browser