Merge pull request #124 from marcesher/master

Pin npm package versions; set v0.9.4
Merge pull request #125 from marcesher/master

Pin versions of packages managed by bower
Add capability for multi-column indexes
Merge pull request #127 from cndreisbach/multi-column-indexes

Add capability for multi-column indexes
Merge branch 'master' of github.com:cfpb/qu
Add compound index definitions, per product owner's advice on expected common filters