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" ( ​https://www.openstreetmap.org/relation/3717144 ).

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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