message: add section on determinism
diff: @@ -24,6 +24,17 @@ these dependencies for Axom.
  and experimentation?
  * Others?
  +Determinism
  +-----------
  +
  +We strive for as close to deterministic behavior in our builds as possible.
  +By this, we mean that repeated builds should should act the same in the following
  +regards:
  +
  +* Set of libraries with their options and versions
  +* Compilers, compiler flags, and versions
  +* Installed file and directory structure with permissions
  +
  ===========================================
  Build Scripts and Their Configuration Files
  