updateCartShippingRates & getShippingRates methods

Fixes https://github.com/reactioncommerce/reaction/issues/220
Relates to https://github.com/reactioncommerce/reaction/issues/100

Move shipping rate calculate to server methods
Store shipmentMethods in cart, addresses refresh/and recalc
Update HTTPS / force-ssl doc
Updated installation.md
updated installation.md
Update installation.md
Update installation.md
Update installation.md
Update installation.md
Update installation.md
Restore email package

Issue #75
refactor schema and collection

refactor schema, collections for cleaner organization
some cleanup of legacy code
fix load order of schemas, collections

remove dangling collections