file deletion test fixed (check the database)
"Try-except" block removed because was shadowing nested keyerror
exceptions, not related to <methods> dictionary,
returning a 404 code instead.
a PUT /files should return a 200 (ok) instead of a 201 (created)
Revert "Commented md5 request for Files methods."

This reverts commit 841006b39d3508f96dfa56fb5bca047c996830bd.
"peeweezation" almost completed (not optimized);
some tests left to update