Intersections data: prepend Borough name

[gregallensworth]

Relevant to #73 some data thoughts...

Client wants Intersection names, to be prepended with the borough in which the intersection is located.

• [x] In the nyc_intersections table add a new borough field, and update it using known techniques of ST_CONTAINS
• [x] Chart view, look in sqlQueries.js and add to the sqlIntersections CONCAT the borough name so the presented name has the borough prepended
• [x] Map view, similar change to sql_queries.js to include borough name, so as to match naming convention. without this, cross-links between Map and Chart won't work

[gregallensworth]

Updated the DB table, and found that 291 intersections do not fall within a borough polygon and thus continue to have a blank for the borough field.

• [x] Chart data query: add AND borough!='' as a clause when filtering for intersections, so we only get those tagged with a borough
• [x] Map data query: add AND borough!='' as a clause when filtering for intersections, so we only get those tagged with a borough

[gregallensworth]

All of the above done.

• Both Map and Chart now prepend the borough name, and filter out any intersections which didn't fall into a borough to get such a prefix.
• Map updated to new borough, name|id format, and cross-links from Map to Chart and vice-versa confirmed to work.