* cleanup makefile with generated code; cleanup unused files

Signed-off-by: Bob Callaway <bcallaway@google.com>

* sort find output to ensure consistent ordering

Signed-off-by: Bob Callaway <bcallaway@google.com>

* force dictionary order

Signed-off-by: Bob Callaway <bcallaway@google.com>

* add comment at top of Makefile.swagger

Signed-off-by: Bob Callaway <bcallaway@google.com>