Website modifications and add a mailmap

[cticenhour]

Made a few adjustments to the website:

• Cleaned up a broken link for David Graves' old group at UC-Berkeley.
• Updated the INL HPC acknowledgement to reflect the current language.
• Updated the Zapdos BibTeX citation to a slightly better version in the bib files.
• Added a documentation.bib file for BibTeX entries used in the documentation, and demonstrated usage of the MooseDocs BibTeX extension in the body of ShootMethodLog documentation. This bib file should be used for all similar in-text citations that are needed in the text in the future. The other bib files present in doc/content/bib are for the "Works that cite Zapdos" listings.

Also added a mailmap file to unify contribution statistics across multiple emails that have creeped into the repository. Without the file, contributors under the same name, but with a different email, would be counted as separate contributors.

@csdechant the MooseDocs demo is the one I mentioned in #227.

[moosebuild]

Job Documentation on 155fef2 wanted to post the following:

View the site here

This comment will be updated on new commits.

[csdechant]

@cticenhour Deleted some comments I made since I misread the propose of the mailmap file. Everything looks good to me.

[cticenhour]

@csdechant @gsgall The mailmap is purely for statistics. If you only ever use one email with your GitHub commits, then there is no need to be on the mailmap. This is only to ensure that when I run git shortlog --summary --numbered we don't have three Alex Lindsays or two Corey DeChants! 😄