Correct Node.js' spelling, link Git and GNOME Keyring
Upgrade to atom-shell@0.15.2
Merge pull request #3164 from Bengt/patch-1

Correct Node.js' spelling, link Git and GNOME Keyring
Center around the cursor in Editor::scrollToCursorPosition by default

Fixes #3131
Upgrade to language-ruby@0.34
Upgrade to language-gfm@0.46