Removed some unused files
Merge pull request #1033 from wibblymat/unused

Removed some unused files
Correct page ID for use-existing-data.markdown
Merge pull request #1035 from crhym3/correct-page-id

Correct ID for use-existing-data.markdown page
Add hint not to use `sudo`

As discussed in google/web-starter-kit#547, newer developers
should know that using `sudo` for `npm install -g` is a bad idea.

Fixes #1013.
Merge pull request #1015 from jacquerie/issue-1013

Add hint not to use `sudo`
Fixes #987 - removes the cog :(
Change 'terminal' to 'command prompt'. (It's a little less dated.)
new article: control crawling and indexing from search engines
Merge pull request #1044 from jpmedley/master

Change 'terminal' to 'command prompt'. (It's a little less dated.)
Adding web app manifest and some images to illustrate certain points
Merge pull request #1049 from google/web-app-manifest

Adding web app manifest and some images to illustrate certain points in device access
Merge remote-tracking branch 'upstream/master' into discovery_and_distribution
tiny tweaks for discovery section
Merge pull request #1051 from agektmr/discovery_and_distribution

New Article: Control crawling and indexing from search engines
Adding in some of Joe's feedback
Adding some further tweaks from Joe and arthurvr
Tidied up the Gruntfile a bit to make it easier to follow
Merge pull request #1053 from wibblymat/grunt-cleanup

Tidied up the Gruntfile a bit to make it easier to follow
Run jekyll builds concurrently for each language (squashed)