Remove stale qutil references

LICENSE

@@ -631,7 +631,7 @@ to attach them to the start of each source file to most effectively
 state the exclusion of warranty; and each file should have at least
 the "copyright" line and a pointer to where the full notice is found.
 
-    qutil
+    python-spectrometer
     Copyright (C) 2020  Quantum Technology Group, RWTH Aachen University
 
     This program is free software: you can redistribute it and/or modify
@@ -652,7 +652,8 @@ Also add information on how to contact you by electronic and paper mail.
   If the program does terminal interaction, make it output a short
 notice like this when it starts in an interactive mode:
 
-    qutil  Copyright (C) 2020  Quantum Technology Group, RWTH Aachen University
+    python-spectrometer
+    Copyright (C) 2020  Quantum Technology Group, RWTH Aachen University
     This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
     This is free software, and you are welcome to redistribute it
     under certain conditions; type `show c' for details.

README.md

@@ -24,7 +24,7 @@ spect_loaded.show_keys()
 
 You can also play around with simulated noise (requires `qopt`):
 ```python
-from qutil.measurement.spectrometer import Spectrometer, daq
+from python_spectrometer import Spectrometer, daq
 spect = Spectrometer(daq.simulator.QoptColoredNoise(lambda f, A, **_: A/f))
 spect.take('foobar', n_avg=10, n_seg=5, A=42)
 ```

doc/source/index.rst

-.. qutil documentation master file, created by
+.. python-spectrometer documentation master file, created by
    sphinx-quickstart on Wed Jun  8 12:00:57 2022.
    You can adapt this file completely to your liking, but it should at least
    contain the root `toctree` directive.
 
 
-Welcome to qutil's documentation!
-=================================
+Welcome to python_spectrometer's documentation!
+===============================================
 
 .. include:: readme_link.md
    :parser: myst_parser.sphinx_
 
-qutil API Documentation
------------------------
+python_spectrometer API Documentation
+-------------------------------------
 
 .. autosummary::
    :toctree: _autogen