Add article for day-19
Add concurrency pattern
Fixes nuance
Ooops
Day 15
Edits for consistency

Used proper nouns. Fixed some grammer mistakes. Clarified
and expanded a few examples.
Added staging area
Merge pull request #52 from bketelsen/staging

Added staging area
Merge pull request #51 from shanemhansen/015-shopping-with-go

Day 15
Stage ginkgo article
Merge pull request #53 from bketelsen/ginkgo

Stage ginkgo article
Merge pull request #40 from mattn/day-19-eject-the-web

Day 19 eject the web
Move day 19 post to staging area.
Merge pull request #54 from bketelsen/day19-move-to-staging

Move day 19 post to staging area.
I have no idea how the line endings got screwed up
More edits
Aspell
Merge pull request #55 from bketelsen/day-15-edits

Day 15 edits