Fix JSON list output.
Clean up json output. Fix test cases.
Add error when constructing an ambiguous match for a flow mod.
Fix interface to ErrorBuilder. Change Connection to return nextId so FEATURE_REPLY will have xid 1.
Rename 'listening' mode in ApiConnection to 'loopbackMode' and reverse the boolean's meaning.
Fix size of version 1 StatsRequest and StatsReply.