use db connection string from environment variable
it's process.env, not process.ENV.
logging connection problems
commenting out attempt to set TZ on db server

cleared not happy with this method of setting the time_zone. need to
research better solution.
adapting to heroku's use of varying port numbers. also pruned some commented code.
best to close db connections when app finished.
trying out the api calls on heroku
changed var names from blahPath to blahUrl where appropriate. Bit of tidying too.
changed js config back to point at local version of api.
Merge pull request #16 from theodi/client-dev

Client dev
fixed conflicts
missing curly brace
Add comp_01 image

for inclusion in wiki
Delete #server.js#
Delete .#server.js
composition layout with bounding boxes - SVG
api url taken out of config.js, determined from window.location.host instead.
update install instructions for dev on macs

include new (small) test data file and change chart.html to default to
date range of classifications in test data file.
fix typo
Merge pull request #21 from theodi/herokuize

Herokuize