Small editions

[bernalde]

Ben, this is looking great.
A few comments which I would like you to address based on my going through the HTML book.

• Remove PSR, NASA, and USRA affiliations from the notebooks
• Add some introduction to the landing page of the Book
• QUBO Notebook: The first example in the QUBO notebook is rendering wrongly (I believe is a double $$ issue)
• QUBO Notebook: the problem statement is rendering within a equation (open $)
• QUBO Notebook: The first plot_energies plot has a lot of tags in the x-axis. There is an argument in that function to make it prettier.
• GAMA: Rendering of the text after Example 4 (open $)
• QA: Rendering of the text after problem statement (open $). Same happens in the QUBO refomrulation.
• Benchmarking: Rendering after the metric definition (open $)
• Benchmarking: Change "Approximation ratio" to "performance ratio" in y-axis labels.
• When sitting in the QA tab, the Benchmarking tab reads as "About this notebook" (I believe is by pre-generating the HTML)

[murraybj]

As a note: The issue with double $$ is an artifact of a regex operation when compiling the JupyterBook. The problem is currently fixed but may reappear later if the developers patch this issue. The open issue is here: jupyter-book/jupyter-book#1181

[bernalde]

Another missing thing, can you put the button to launch the Google Colab notebooks (both here and in the other book)?