[WIP] Fixes #16
Aligns Hub Dashboard/.stat-* to left by default
Use https for staging

So we make sure integration page is properly loaded in every browser
when running ssl
Specified first_name and last_name for the integration user for those systems that require users to have a first and last name
This uses our own, more secure API authentication token

Replaces the native Spree API key mechanism. This token is accepted in
all the same ways as the Spree API key is on our end, so this change
should be transparent to the Spree Hub.
Revert "This uses our own, more secure API authentication token"

This reverts commit c23c18acc8c7aa51fcd994b1071a8dc211eaa477.