Update Querylanguage.md

issue #207
Show how to disable grunt hook

I found out how to disable grunt hook in GitHub issues so I added the solution to docs. I hope it's OK.
difference --dev and --prod

Adding a description of the difference between --dev and --prod
Update README.md
Update blueprint-api.md

The previous links didn't function correctly. I believe this document is peppered with references to pages that have either been moved or no longer exist. It also seems the Custom Blueprints guide has been removed completely from the documentation.
Merge pull request #234 from TheNorthEestern/patch-1

Update blueprint-api.md
Merge pull request #227 from nevyk/master

Show how to disable grunt hook
Merge pull request #223 from jub3i/patch-5

Update Querylanguage.md
Merge pull request #228 from mdunisch/patch-3

difference --dev and --prod
Merge remote-tracking branch 'core/master'