add intro and platform-support docs
Merge pull request #2363 from jlipps/master

add intro and platform-support docs
Merge pull request #2362 from bootstraponline/master

Remove YAML front matter from docs
Allow for whitespace in app path.
Merge pull request #2366 from paymand/whitespace_in_app

Allow for whitespace in app path.
make sure grunt command is quoted in reset.sh in case cwd has spaces