Add CLA? column

Add a column which tells us whether that author has a signed CLA on
file in stigdb-legal.
Merge pull request #66 from vmbrasseur/master

Add CLA? column
Harden the build a little bit

Add a number of the flags documented in https://wiki.ubuntu.com/ToolChain/CompilerFlags to our compiler flags so that we both link faster and give a little better protections.

Note: We don't FORTIFY_SOURCE because it seems to have some odd behavior which isn't worth tracking down ATM.
Merge pull request #67 from cmaloney/master

Harden the build a little bit
Add PDF of CLA

For people who have PDF viewers which can edit/sign the doc (Preview on
OS X, etc.)
References the PDF version of the document

Add a ref to the PDF version of the CLA.
Merge pull request #68 from vmbrasseur/master

Add PDF of CLA