Use actual value for SINGLE_QUOTES/DOUBLE_QUOTES
UltiSnips: default to no ID for divs
UltiSnips: HTML div with class.
UltiSnips HTML: Remove redundant img snippet
Fix bug #471: Swap spaces for a tab in pry snippet
Add snippets `'`, `"` and `doc`

`'` and `"` use a new function `triple_quotes_handle_trailing` which
handles trailing/existing quotes.

This handles expansion of`"|"`, where the second quote gets automatically
inserted by e.g. delimitMate.
Scala for comprehension
Ultisnips: Common CSS snippets

These already exist in the `snippets` style, but thse will not be loaded
by Ultisnips when working with SCSS files, due to how the extend feature
works.
Ultisnips: CSS. Colours, shadows, text-transform.

Also remove IE6 specific fixed position snippet.
${1:text} snippets snippet
Merge pull request #470 from blueyed/python-doc-quotes

Python: add triple doc quotes and handle expansion of `"|"`
Merge remote-tracking branch 'upstream/master'