TileConstants: isConstructed() returns true if tile >= ROADBASE

git-svn-id: http://micropolis.googlecode.com/svn/trunk@783 d9718cc8-9f43-0410-858b-315f434eb58c
getPollutionValue: use isFire and isRadioactive instead of comparing numbers

git-svn-id: http://micropolis.googlecode.com/svn/trunk@784 d9718cc8-9f43-0410-858b-315f434eb58c
getPollutionValue: move to TileConstants

git-svn-id: http://micropolis.googlecode.com/svn/trunk@785 d9718cc8-9f43-0410-858b-315f434eb58c
cleanup: remove no-longer-used isBigZone()

git-svn-id: http://micropolis.googlecode.com/svn/trunk@786 d9718cc8-9f43-0410-858b-315f434eb58c
TileConstants: remove hardcoded tile values from OverlayMapView

git-svn-id: http://micropolis.googlecode.com/svn/trunk@787 d9718cc8-9f43-0410-858b-315f434eb58c
isRoad: fix bug in which the wrong variable was used

git-svn-id: http://micropolis.googlecode.com/svn/trunk@788 d9718cc8-9f43-0410-858b-315f434eb58c
isWire: fix bug in which the wrong variable was used

git-svn-id: http://micropolis.googlecode.com/svn/trunk@789 d9718cc8-9f43-0410-858b-315f434eb58c