v0.6.3

Alpha 0.6.3

1. updated product grid layout with 3 box sizes
2. adds bower packages
3. updated meteor dependencies
4. refactor users roles and permissions
5. autoform upgrade to 0.5.x
6. documented and windows installation
7. adds inventory variants (with inventory management)
8. 70+ tests passing with Circle CI testing on app & core
9. known issues with cart session handling