part of #481. fix oneJar code coverage issue (coverage info corrupts JAR), test built SlamEngine JAR, allow environment variable overrides of backend-config, modify travis to use local mongodb override, auto-import zips data set when in travis builds. manually download, install, and launch mongodb 2.6 since travis doesn't support it. make all scripts run in super strict mode. note: publish script has not been updated and jenkins is no longer expected to work.
Merge pull request #500 from jdegoes/ready/481

build process improvements
don't drop spaces in path/collection names (fixes #499)
URL-decode path segments (Fixes #498)

- and a nicer extractor for path segments
Merge pull request #501 from mossprescott/ready/paths-with-spaces

Two issues with spaces in paths in the API
make sure mongod starts up before proceeding to import
Merge branch 'master' of github.com:slamdata/slamengine
cleanup readme situation. part of #481
Merge pull request #502 from jdegoes/ready/481

cleanup readme situation. part of #481