relax moving wifi detection and only look at past 30 days for movement

30 days is arbitary, but ensures we don't exclude wifi AP's based on
mismatches from old imported data and new data
extend importer script to allow passing the userid for attribution purposes
fix positional vs. named argument confusion in importer
maintain key field in mapstat table
update importer script to maintain more user scores and update mapstat table
remove `/map.csv` - really closes #35
note two todos
extend manifest.in to capture all non py files and small metadata updates
explicitly note dependencies in setup.py instead of just requirement files
some more docs / link updates
prepare
vb
Fix unvarred variable in stats graph script
Merge pull request #48 from MikeNicholls/master

Fix unvarred variable in stats graph script
extend `make clean` to catch more autogenerated artifacts
setup npm boilerplate to install `uglify-js` for development purposes
remove unused JS resources for the heatmap
update to mapbox.js 1.5.0 and latest markercluster library

also include versions in file names to make it easier to check for updates
in the future
avoid inline JS and refactor map_world to use a separate JS file
add a new `make js` command and use a combined js file for the maps page