RPCValidator completed for Pull Request

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added file to test RPC
Added a class to test RPC
made method name checking in RPCValidator case-insensitive
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Fixed inability to check syntax in RPCValidator
Added checking of "jsonrpc" member for validator
Merge branch 'master' into padawan
Tweaked RPCValidator to use RPCResponseFactory
Merge pull request #13 from blackdoor/padawan

Created RPCValidator to check if incoming requests are of the JSON RPC 2 spec.