implement `unregister` which removes an unloaded project from the registry
filter same source, clone repo fix

- option to filter out same source entries in diff
- fix clone to properly register the correct repository
should be legal to clone an unloaded project
use the @project file to change what gets loaded ... at least for the load list
turn red if version skew exists
testing
make sure that projects with version skew are visible

- try to color the line red (doesn't work?)
- sort to top of project list
- funky ()s to draw the eye