Enabling functionality to manage calls within the evaluated expression    - these are OFF by default    - they can be enabled by a flag in the line completer    - Adding infra to maintain a hook to grab the global completer instance
Enabling functionality to manage calls within the evaluated expression
   - these are OFF by default
   - they can be enabled by a flag in the line completer
   - Adding infra to maintain a hook to grab the global completer instance

Signed-off-by: Mark Nicholson <8d4a425c9e0ad7c7b6af22eb501c109304c1d477@gmail.com>

mark-nicholson/python-editline,mark-nicholson/python-editline,mark-nicholson/python-editline