add "route" role (to presets?)

[mkoniecz]

According to ​http://wiki.openstreetmap.org/wiki/Relation:route#Members empty or "route" role should be used for ways making up the route.

Currently using empty results in "Empty role found" and "route" in "Role route unknown".

Probably the second version should be encouraged and should not result "Role verification problem" warning from validator.

Repository Root: http://josm.openstreetmap.de/svn
Build-Date: 2014-06-10 01:34:35
Last Changed Author: Don-vip
Revision: 7235
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
URL: http://josm.openstreetmap.de/svn/trunk
Last Changed Date: 2014-06-10 01:09:36 +0200 (Tue, 10 Jun 2014)
Last Changed Rev: 7235

Identification: JOSM/1.5 (7235 en) Windows 7 32-Bit
Memory Usage: 784 MB / 784 MB (224 MB allocated, but free)
Java version: 1.7.0_55, Oracle Corporation, Java HotSpot(TM) Client VM
VM arguments: [-Xmx812M]

Dataset consistency test:
[WARN - NO NODES] Way {Way id=266461110 version=2 VT nodes=[{Node id=30371655 version=9 V lat=50.0719727,lon=19.8024335}]} has only one node


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