Add barrier namespace.
Add core.util namespace.
Add error namespace.
Improved error management on storage.collections namespace.
Use barrier on command line interface point entry.
Make config setup function as monadic function.
Add uuid helpers namespace.
Split collections namespace document related functions and types...

... to separated documents namespace.
Add missing license header on core.edn namespace.
Add mammutdb.api namespace layout.
Monadic connection management.