add .DS_Store to .gitignore

strange that it wasn't already...
add class alert--warning to 404 message
add class alert--warning to lt i.e. conditional, suggest chrome frame
index.php: add class alert--warning to no results found alert
lang: update translation files, replace occurrences of "roots"
cleanup.php: clean up

- remove null filter on use_default_gallery_style

- remove function exai_attachment_link_class: was intended for BS2 support
config.php

- add comment about POST_EXCERPT_LENGTH constant

- remove reference to bootstrap container width
gallery.php: add lines removed in 980957545e to end of file
rewrites.php: fix link to roots repo
scripts.php: update jquery, disable ga tracking for admins

note that many changes in roots are due to its adoption of grunt.js. this may be more efficient than using a tool like codekit.

- update query to 1.10.2

- ga: don't track users with capability 'manage_options'
sidebar.php: "Allow the sidebar config functions to accepts args"

https://github.com/roots/roots/commit/a27b194fe66d29aeebf9ddea7f37abfa58aa4c23
wrapper.php: "Rework Roots_Wrapping class"

"Apply the wrapper to any template by creating a new instance."

https://github.com/roots/roots/commit/78eab9c702027f9b2f618a447d8921fb9bdc1cbe