adc: Teach move to copy repositories
setup.py: Install link copy -> move in adc/bin
adc: Send notifications about moving and copying of packages
adc: Prevent copy command from copying auto tags and Ra branches
adc: quiet fetch in move/copy
Merge changes regarding move/copy adc
slug_watch: Add projects.list.head file feature

The adminitrator can create projects.list.head file. Its contents
will be added at the beginning of projects.list file.