Always use interface name as package name

[tengstrand]

Is your feature request related to a problem? Please describe.
Simplifies the package structure when more than one component conforms to the same interface.

Describe the solution you'd like
Example. Before:
user2/src/com.example.user2.core.clj
user2/src/com.example.user.interface.clj

After:
user2/src/com.example.user.core.clj
user2/src/com.example.user.interface.clj

Also fix the 'info' command when listing systems to show the component name and do not include the interface name.