Add more checks and fix some issues

	* All checks from this plugin are now in the group "kaart"
	* Add a check looking for links connecting two roads, where the two roads also connect
	* Fix some errors

Fix some errors and add some new features

	* TurnLanes
		* Looks for || and expands to none|none|none
		* Start work on looking for ways like way 365446753 that continue at almost
		  right angles and have turn lanes onto it.
	* LinkDestinations
		* Try to select all the links that will be affected by the "fix" so that
		  they are all fixed at the same time instead of piecemeal over many different
		  validation runs
	* RoadEndsWithLinks
		* Improve message (now says "Check for Y junction links" + ...)
	* Maxspeed
		* Ignore _links

Add additional checks for validation

	* Check maxspeed consistency (look for short roads that have no speed where
	  the road surrounding it does and is the same on both sides)
	  autofix available
	* Check that links have either a destination:ref or destination:street
	  autofix available, prefers destination:ref over destination:street
	* Checks for roads that end with short links
	* TurnLanes works better (many null pointer exceptions fixed)
	* All validation checks now output better debugging information, like
	  which way caused the error

Initial working release

	* Checks to make certain turn lanes continue through intersections