dotpath replacing jid

The primary purpose of the release is the swapping out of jid for a local submodule named dotpath.
This removes a dependency for an external package and keeps the code minimal (dot path in only about 150 lines). It does mean that interactive mode of jsoncols has been removed. If you need this then use jid which is nice for this type of exploration. There are sure to be bugs introduced by this switch... YMMV