WI: minor adjustments & new Alternate route

[mapcat]

WI 32: as drafted, the CRN_For <-> CRS_For segment follows a county road instead of the correct path. It looks like it has had its current routing since GMSV began, so there's probably no need for an updates entry.

WI 40 & WI 40 Business (Bruce): their northern junction is off, and so is the RRAve (RaiAve_E may be better) point on the business route.

WI 155: the north end (CRN) should be at the stop sign a block north of where we have it.

WI 13 Alternate (Ashland) is signed, and follows the routing of Alt US 2 and US 2. Hard to understand why this one exists, but it does. GMSV has avoided most of the area for 6 years but here's one sign and here's another.