Change do_choose_write_nodes to accept the Include list.
Modify choose_write_nodes to accept an Include argument.
Rename parse_exclude to parse_inclusion.
Add Inc to new_blob.
Add the inclusion to the command parsing code.
Parse the inclusion list in the erlang code and actually use it.
Add the forceon option to the python code.
Complain if the requested replica is not found.
Fix a missing argument when calling new_blob.
Merge pull request #371 from pooya/shayan/upstream_ddfs_change_fix

Shayan/upstream ddfs change fix