DC Power Jack for Reichelt HEBO13

Adding
* part DC_JACK
* package DC_JACK_HEBO13
* symbol DC_JACK
Symbol DC_JACK: Direction auf »pas« (passive)
Added SENSE output to DC Jack, affected parts:
* part DC_JACK
* package DC_JACK_HEBO13
* symbol DC_JACK
Re-use existing DC-JACK from con-jack.

Affected parts:
* sym DC_JACK
* sym JACK-PLUG
* part DC_JACK
Package DC_JACK_HEBO13: adjusted solder pads
Merge pull request #45 from penguineer/hebo13

DC Power Jack for Reichelt HEBO13