cling

When trying to define an operator in the cling cli repl, the "function definition is not allowed here" error is generated. "cling -version" reports "0.8". Here's a copy/paste of a session to demonstrate the issue:

****************** CLING ******************
* Type C++ code and press enter to run it *
*             Type .q to exit             *
*****************************************

Currently, even if you select a bunch of lines, each line is sent independently. This is probably not the best behaviour, rather send all of them at once as it was a jupyter notebook cell.
Also it could be really interesting to be able to send cells of python code surrounded with {{{ ... }}} as they were a jupyter cell.

• Send Control+O to send bunches of lines at once.
• Create some