BugFix: flickr.photos.search: limit "parameterless searches"
Use Scala 2.11.1 ("2.11.+" does not work)
Bugfix: Replace: "it" -> "describe"
Add tests for signed invocations; Fix all invocation tests
Rename vals: _ -> (un)signed_
Refactor method invocation tests
BugFix: add default value for "signRequest"
Test flickr.photos.search: show photos' links