Ass 4

First draft of the parser/consumer principle. Little changes on the
whole project. Now, one can make request (and get an empty reply) for
all enumerated sensors listed in RequestParserImpl$SensorType

Added:

Factory for consumer and parser

ParsedRequest
-Store all necessary fields of a request

ConsumerImpl
-Implement a consumer for requests

ParserImpl
-Implement a parser for requests

Updated
-The whole task accordingly
Begin parsing , merge with master branch