Embed the diode lib to avoid test dependencies

This commit introduces a breaking change in the diode API in order to
hide the diodes package interface. This removes a good number of
dependencies introduced by the test framework used by the diodes
package.

Add go.mod file

Fix ConsoleWriter when zerolog is configured to use UNIX timestamp

Update README with instruction about binary encoding

Add RawJSON field type

Add go 1.9 to travis file

Simplify copies

Fix pretty logging and add a screenshot to the README

Add missing console file

Add a ConsoleWriter to output pretty log on the console during dev