Map view includes current column id in url to facilitate sharing

Include the column id in the anchor portion of the url (eg. #col-B12345) to facilitate link sharing, since the map really depends heavily on the column being shown.
Cleaner way of including column and sumlev in anchor urls
Don't change URL too soon when choosing new sumlev
More robust URL building for maps
Merge branch 'longhotsummer-patch-1'