Rework police station management.
Add 3 digits zip code for Taiwan towhships.

Data source is http://download.post.gov.tw/post/download/county_h.csv
Add county and township selector in navbar.

To show detailed information for police stations within specific township,
need to select county and township in navbar first.
Update presentaion format in google map.
Add infowindow.
Fix map control glitch.

See http://stackoverflow.com/questions/7471830
(google-maps-api-v3-weird-ui-display-glitches-with-screenshot)