Replace editor from SublimeText2 to Atom in the install page.
Change Atom install process to using zip file.
Fix english sentences.
Updated OpenShift instructions to handle Ruby 2/Rails 4
More additions to help with situations Windows users may encounter
Remove trailing slash in self-closing elements.

The HTML5 spec says they're optional:

http://dev.w3.org/html5/spec-author-view/syntax.html#syntax-start-tag
Normalize all localhost links with <> syntax.
Minor improvements for commenting guide.
Update heroku guide.

Also replace the app with a live one.
Merge pull request #196 from codemiller/master

Updated OpenShift instructions to handle Ruby 2/Rails 4
Merge pull request #197 from JuanitoFatas/doc/patch-1

Remove trailing slash in self-closing elements.
Merge pull request #198 from JuanitoFatas/doc/patch-2

Normalize all localhost links with <> syntax.
Merge pull request #199 from JuanitoFatas/doc/patch-3

Minor improvements for commenting guide.
Merge pull request #200 from JuanitoFatas/doc/patch-4

Update heroku guide.
Merge pull request #195 from railsgirls/replace_editor_to_atom_in_install_page

Replace text editor from SublimeText2 to Atom in the install page.
Merge branch 'master' into nitrous
capitalize os names for consistency with the rest of the guide