Modify zenpack run to properly install linked zenpacks
Change cp to rsync in zenpack Run for linked ZPs
Merge pull request #642 from zenoss/feature/linkZPRun

Modify zenpack run to properly install linked zenpacks
Change link ZP install to fail if dir already exists
Merge pull request #643 from zenoss/feature/linkZPRun

Change link ZP install to fail if dir already exists
Merge pull request #644 from zenoss/release/5.0.0

Release/5.0.0