remove commented lines of code leading space

I had problems with the installer because I wasn't used to YAML nor with its required indentation. IMHO, this way it would have been intuitively clear to me it needs it that way.
FIX: track tests-passed, not master
FIX: ensure we are tracking the branch
FIX: correct branch stuff
FIX: checkout correct branch in base image.
allow to correctly track head if needed
Update Dockerfile
Update Dockerfile
FEATURE: add pngout to the base images
Merge pull request #63 from discourse/add-pngout

FEATURE: add pngout to the base images
Add easy configuration for max file upload size

Example, in app.yml:

params:
  version: tests-passed
  upload_size: 10m
Merge pull request #64 from riking/configurable-upload-size

Add easy configuration for max file upload size
Merge pull request #52 from cauerego/patch-1

remove commented lines of code leading space
remove ubuntu 13 in favor of ubuntu 14
Fix typo on Ubuntu version
add fuzzystrmatch extension
Revert "add fuzzystrmatch extension"

This reverts commit 80863b2363bb973f712675be7bf250f8674b0948.

That extension was causing more trouble than needed...
Add nginx cache directory
FIX: have "rebuild" update discourse docker
Merge pull request #65 from eflynn/patch-1

Fix typo on Ubuntu version