Dev (#123)

* Adding support for QSpice Simulator

* Adding support for QSpice Simulator

* Solving the issue with the QSPICE raw file extension.
The QSPICE and LTSPICE raw files are not compatible

* Cleaning up qraw files

* Averting problem with non utf8 characters.
This needs to have a better fix afterwards.

* QSPICE testbench also uses RawRead

* Using the time function for the timeout calculation. And using the start time to compute the timeout.

Fixing problem with relative imports

Refactoring the SimRunner so that it can cycle multiple times on the completed tasks

* Adding missing test file for NGSpice example

* Fixes on the logger messages.

* File rename

* Fixing issue in the Client Server when an output folder is defined.

Adapting the ServerSimRunner class to the changes done recently on the SimRunner task, where complete_tasks list was added.

Refactoring the timeout mechanism so that the correct timeout is applied per task, taking into account the task start time.
Adding dedicated function that calculates the timeout time to avoid code duplication

* Correcting an issue in the argument type for the simulator object.

Renaming the file_cleanup to cleanup_files. Keeping the former as legacy.

* Setup and README.md fixes