start of static analysis for index page
fix bug where layers from each school selection were stacked. layers are now removed.
commented mistakenly committed popup and made layer remove a little safer.
Merge pull request #26 from sleitner/master

fix issue #1
separate post-load javascript files
style the NCs
highlight neighborhood on mouseover
hover-over shows NC names
first stab at display schools on click
draw lines from NC center to school
line mouseover gives counts
fix issue #28, school lines not being erased
rename (interim) and button improvements

buttons still don't work
schools map display reflects counts; resembles neighborhood

Should probably consider drawing lines, adding mouseover like Neighborhood.
Rearranged JS a bit.