initial commit

copy stuff from calvad_wim_sites.  modify lib/query_couchdb, write a
test.

test hasn't been run yet, and isn't passing
test is passing for check_imputed

modified:   lib/query_couchdb.js
modified:   package.json
modified:   test/test_check_imputed.js
implement getting list of vds need raw imputed

look at couchdb, get list, filter for nothing and unprocessed

also a test

not yet tested

modified:   lib/query_couchdb.js
modified:   test/test_get_wim_sites.js
test for vds query list raw imputed is passing

can get zero for 2007 (not in test), 8 for 2010, and 514+ for 2014

when I actually get 2014 data, I'll ahve to edit that test...
test passing for get imputation done list of vds