Update README

[hwinkel]

Can you please add a README describing what metric man is and how it work. Please add also the dependencies. As far I know metric man depends on exometer which in turn could pull in snap which required mnesia, So a quite long dependency tree behind metricman ?

[surik]

Will do.

There is no mnesia:

metricman $ iex -S mix
...
> :application.loaded_applications
[{:mix, 'mix', '1.1.1'},
 {:exometer_core, 'Code instrumentation and metrics collection package.',
  '1.4-2-g0da8f3a'}, {:stdlib, 'ERTS  CXC 138 10', '2.6'},
 {:public_key, 'Public key infrastructure', '1.0.1'},
 {:goldrush, 'Erlang event stream processor', '0.1.6'},
 {:setup, 'Generic setup application for Erlang-based systems', '1.5'},
 {:iex, 'iex', '1.1.1'}, {:logger, 'logger', '1.1.1'},
 {:exometer, 'Code instrumentation and metrics collection package.',
  '1.2-4-g7fe87f5'}, {:compiler, 'ERTS  CXC 138 10', '6.0.1'},
 {:elixir, 'elixir', '1.1.1'}, {:ssl, 'Erlang/OTP SSL application', '7.1'},
 {:crypto, 'CRYPTO', '3.6.1'}, {:kernel, 'ERTS  CXC 138 10', '4.1'},
 {:lager, 'Erlang logging framework', '2.1.1'},
 {:metricman, 'metricman', '0.0.1'}, {:hex, 'hex', '0.9.0'},
 {:syntax_tools, 'Syntax tools', '1.7'}, {:inets, 'INETS  CXC 138 49', '6.0.1'},
 {:asn1, 'The Erlang ASN1 compiler version 4.0', '4.0'}]

[hwinkel]

OK; as long Exometer has no SNMP there is no mnesia