use sigterm instead of sigkill to kill the server

sys.exit() causes a hang for some reason but
os._exit() does not

Signed-off-by: Thomas Stilwell <stilwellt@openlabs.co>
add new env variable HTTP_PORT to setup port forward in docker nat network.
add env MARKET_PORT
INSERT, UPDATE, DELETE wrappers make use of SQLite prepared statements.
Introduced beforeStoring method.
Merge branch 'master' of https://github.com/OpenBazaar/OpenBazaar into counter-sqli
Silly escaping for quotes to prevent SQLi.
Match coding style.
Don't escape twice.
Added new test case with malicious input.
Peers actually report back no listings if they have none.
Merge pull request #389 from sophron/counter-sqli-for-select-operation

Dummy fix to prevent SQLi vulnerability
Merge pull request #387 from sophron/counter-sqli

Counter SQLi improvements
Merge pull request #390 from hoffmabc/master

Peers actually report back no listings if they have none.
Add jshinting
Refactor checkstyle.sh
JS style fixes on user controller
contract tools js style fixes
JS style fixes on app.js
JS style fixes on connection service