Update Changelog.
Update Changelog.

smspillaz/double-conversion,floitsch/double-conversion,bugdebugger/double-conversion,bos/double-conversion,smspillaz/double-conversion,BRAINSia/double-conversion,google/double-conversion,floitsch/double-conversion,google/double-conversion,bugdebugger/double-conversion,google/double-conversion,floitschG/double-conversion,floitschG/double-conversion,project-zerus/double-conversion,vitaut/double-conversion,bos/double-conversion,BRAINSia/double-conversion,bos/double-conversion,BRAINSia/double-conversion,project-zerus/double-conversion,vitaut/double-conversion