This uses flat icons from the Noun Project now. This is just the first
step.

This can now be used to create arbitrary sprites which is useful for
plugin authors wishing to create their own additional images.

this is not yet supported in the CSS. once it is it should be added to
the builder script.

* master: (396 commits)
  remote.test
  add a Exception in hasAccess()
  correctly handle usergroups array
  improve aria attribute handling. closes #1142
  remove pragma:no-cache header. closes #1201
  translation update
  translation update
  no syntax highlighting, it attracts too much readers attention
  Better suggestion for changing warning for nosmblink in browsers
  fixed a few links and html errors in language files
  fixed some wrong quotation marks in language files
  fixed occurrences of html named entities in translation files to be xhtml-compatible
  removed English translation strings from non-English translation files
  fixed lots of missing format strings in language files
  refactored tpl_actiondropdown() to avoid duplication
  changed all input type=submit buttons to button type=submit button for better stylability
  translation update
  adjust newline
  translation update
  translation update
  ...

not sure if I like it