[Thumbor] reply 204 on HEAD method
Merge branch 'feature_BasicHandleHeadQueries' of https://github.com/dhardy92/thumbor into dhardy92-feature_BasicHandleHeadQueries
Proper pyvows call in makefile
Revert "Proper pyvows call in makefile"

This reverts commit b55430145a469d62d2deafc25dd20595f2eb5fc8.