Rework/global edit to enforce type templating of fermion operators.

Allows multi-precision work and paves the way for alternate BC's and such like
allowing for example G-parity which is important for K pipi programme.
In particular, can drive an extra flavour index into the fermion fields
using template types.

scripts/cleanup

@@ -1,3 +1,4 @@
 find . -name "*~" -print -exec rm -f {} \;
 find . -name "errs" -print -exec rm -f {} \;
 find . -name "log" -print -exec rm -f {} \;
+find . -name "*.bak" -print -exec rm -f {} \;