Initial inclusion of ctemplate
Initial inclusion of the ctemplate C++ library. This is required for Kraft.
I am using the latest git commit for python3 support. A new release has not yet been for python3, but this will use that tag when it happens.
Test Plan: Build and test Kraft using this package.
Reviewers: Triage Team, JoshStrobl
Reviewed By: Triage Team, JoshStrobl
Maniphest Tasks: T8617
Differential Revision: https://dev.getsol.us/D8113