When using big session timeout values, the interval value might
overflow and cause the setInterval() call to ping the server in a loop
without any delay.

This fix adds a maximum ping interval of 24 hours.

Forward port of 00ec5fc1935c946e846a8ff28491e5b5b017b3d7 from stable6.

Snapper doesn't work at all for IE8 and IE9 and messes up with the main
container layout when enabled.

This commits disables snapper for these browsers.

Now that the navigation menu is always togglable, the media query
dependent code can be removed.

* added parameters for humanFileSize to trigger that behaviour
* add unit tests for that

Sometimes no icon file is passed to replaceSVGIcon(), it showed an error
in IE8 and broke the code flow.

This fix adds a check whether the file name is set.

- added sharing overview entries in the sidebar
- use OCS Share API to get the list of files

This functions have been deprecated since Oct 2012 (ownCloud 5), let's finally remove them for ownCloud 7.

Ref https://github.com/owncloud/core/commit/c4b8bb10411a4d601b7f4c8758980005f14850ab

- FileList is now an instantiable class
- FileActions is now in namespace
- added App class for trashbin app
- moved trashbin overrides into classes extending FileList
- replaced many static calls with "this." or "self." to make the classes
  reusable/extendable
- new URL parameter "view" to specify which view is shown, for example
  "files" or "trashbin"
- added OC.Util.History utility class in core for handling history
- moved URL handling/routing to OCA.Files.App
- popstate will correctly update the current view and notify the view of
  the URL change so it can update the current dir
- added JS unitt tests for the trashbin app
- fixed public app to work with the new namespaces

- added new OCA.Files namespace for files classes
- the sidebar can now switch between views/containers
- the trashbin renders in its own container but currently doesn't work
  due to overrides
- added app.js as entry point for JS code (ideally all other files should
  only contain classes and not trigger anything)

- moved file selection code to FileList
- fix selection summary when all files are selected
- nextPage now auto-selects files if "select all" checkbox is checked
- fixed trashbin to use the same selection logic as FileList

- moved the summary code into a new class FileSummary
- FileSummary is calculated only once, then updated with add/remove
- added new OC.Util namespace for JS utility functions

Also used JSHint.com to find a few other issues.

-Strict comparisons (===)
-Fixed regex escaping errors
-Refactored OC.buildQueryString to use jQuery.map
-Missing semicolons
-Braces around if block

Left some of the mixed spaces/tabs as they are for alignment in comments.