Add the server module
Move the SubprocessServer to the server module
#99 refactoring
#93 Make QCodeEdit start the server and modes now
use get_server
#99 Add new classes/fct to public API
#99 Style formatting
#99 Add base class for worker

Define the _slot attribute and set it to default
Merge pull request #101 from ColinDuquesnoy/feature/server-refactoring

Feature/server refactoring