Tools to add

[amishscientist]

Static Analysis
Flaw Finder -- https://dwheeler.com/flawfinder/

Other Tools
Source Trail -- https://www.sourcetrail.com/
Herb Grind -- http://herbgrind.ucsd.edu/
Approval Tests -- https://github.com/approvals/ApprovalTests.cpp

If you would rather me make a pull request to add these just let me know.

[amishscientist]

@lefticus I was wondering if you needed me to do a write up for the tools to give you more information on them.

Thanks