word change for clarity

changed "200 error code" to "200 status code"
fixed typo
plural
Merge pull request #784 from BobStevens/master

quickstart guide - wording changes for clarity
Merge pull request #786 from mgaitan/patch-1

Missing `s` in a plural word
Test blinker development version again

Apparently blinker isn't broken on tip anymore.
Merge branch '0.10-maintenance'