Possibly fixed bug with BloomFilters, where a nonstandard tx request could trigger a crash
Added further boundary checks to getOp2 - might solve the bloomfilter crash issue
Added check for confirmation.find returning end().
Fixed indefinite loop in Claims::transactions
Added filtered_block to inv types
Move logic to convert names to JSON to separate function.

Move the code to convert a Namecoin name status to a JSON object (as
returned by name_show / name_history) to a separate function, so that it
can be used for both name_show and name_history.
Implement name_history.

Implement the name_history RPC command for Namecoin.