(feat) Use and support unboxed closures for Handlers.
(fix) Correct dependencies on serialize and log.
(feat) Removed the explicit newtypes for response modifiers.
(fix) Update examples for new Iron.
Merge pull request #251 from reem/unboxed-closures

Fix for dependencies and rust changes, include unboxed closures, and fix modifiers.
(release) 0.0.10.