Request: Remove the filter for queries longer than 100 characters.

This number set looks arbitrary, and it's breaking the behavior of some IAs such as Calculator in https://github.com/duckduckgo/zeroclickinfo-goodies/issues/283
DDG::Request.pm: Move query max length to 500 to match the internal code.
Merge pull request #86 from duckduckgo/jag/100

Request: Remove the filter for queries longer than 100 characters.