Bump lager version and add diagnostics

start of a diagnostics module for running systems

start of a table module and table of manifests

working tables and one for manifests

more useful manifest tables

bump lager to 2.0 and use a velvet tag that supports lager 2.0

pretty print manifests now

remove "dead" column from manifest table
fix dialyzer warnings
remove comment
fix param specs for print_manifest/2,3
Merge pull request #562 from basho/feature/diagnostics

Bump lager version and add diagnostics