split local and remote tests

new file:   test/test_get_local_files.js
renamed:    test/test_get_files.js -> test/test_get_remote_files.js
test for local amelia get passing

modified:   get_files.js
modified:   test/test_get_local_files.js
vdswim impute not running properly

apparently I got it running last time but didn't commit the changes
properly??  Anyway, it isn't running now.

This commit fixes the triggering node.js code

this commit also changes the db call to skip the district limit, and to
use the query that looks in the neighbor table, not the paired table.
Not sure why I am using the paired table.

modified:   trigger_vdswim_impute.js
modified:   vdswim_impute.R