Fixing failure message from client CAF-268
Create README.md
Removing conflicting option from --instance
Merge pull request #3982 from cinquo/master

Improving failed task/job group messages from client
Merge pull request #3983 from mmascher/messages

Fix a couple of printouts
Merge pull request #3984 from mmascher/optional-proxy

Optional proxy
Merge pull request #3985 from mmascher/master

Dump the right dict for analyzed lumis. CAF-315
Fixing MC plugin. Adapt to the PanDA related changes. New input parameter Improve Validation CAF-309 and CAF-211
Merge pull request #3986 from spigad/master

MC
Fix getoutput. Pass the task option to load the cache.