Show pass vs fail rate in the summary

Changelog for v0.0.6:

Commits
4dda81b Add success vs. failure etc for jobs into summary by @alexellis
04b43f2 Update .DEREK.yml by @alexellis
5e0b14e Update README.md by @alexellis
ed42474 Update README.md by @alexellis
748c7db Update README.md by @alexellis

Changes: v0.0.5...v0.0.6

Generated by Derek