Documentation changes.

[bagashe]

• Removed MarginPhase from Acknowledgments.html.
• Minor tweaks to InspectingResults.html included a couple newer screen shots.
• Exploded Computational Methods in index.html.
• Moved Acknowledgments to the bottom of the table of contents.

[bagashe]

You can see the changes at https://bagashe.github.io/shasta/index.html