Fixed Albany_ExtrudedSTKMeshStruct so it works with long long ints in new Albany master branch (with tpetra).
This requires the following configuration flag in Trilinos:

  -D Teuchos_ENABLE_LONG_LONG_INT:BOOL=ON \

To prevent problems for people building the code who don't have this flag, ifdef'ed out
the ExtrudedSTKMeshStruct so it only gets build if FELIX physics are turned on, as this mesh struct
is only used now for FELIX problems.  Updates nightly test scripts and TODOs to reflect the change.