Please support "target" config option

[ThorbenJ]

Please support the target config option to set where to store the parsed data (instead of in the root). For example see the netflow codec plugin.

[consulthys]

Any reason why this has not yet been merged into the master branch?
@ThorbenJ

[kares]

(still an early draft atm but) we are to handle target on all codecs in a generic way: #80