Add upstart support for services

• Fix regression with JSON format. duration should be int64 not float64

New feature:

• Add goss validate --format nagios to allow script to be used with Nagios/Sensu

Changes:

• goss add --ignore-attr changed to goss add --exclude-attr
• Normalize duration output to seconds
• JSON format now includes a summary-line that is more human readable.

• Add --ignore-attr flag to add command: doc

• Add duration to output. Made json output key names consistent with goss.json
• Fix issue #10

Fix issue #8

Fix typo in json processe -> process

Note: If migrating from a previous version JSON will need to be modified manually to process

Add goss validate --format json

Two new features to goss validate:

• goss validate --format FORMAT, valid options are:
  • rspecish: same as before [default]
  • documentation: More verbose output, can be useful for audit reports
• color output by default for tty, goss validate --no-color to force off

• Changed JSON format to use maps (maybe use hcl in the future?..)
• Change -f flag to -g
• Cleanup some dead code