core use php sessions and memcache
loginAsOtherUser admin only, or general when debug is 2
Fixed Issue 130: File upload size limit

Documents have max upload of 8 MB per file. Organization can only
upload a max of 25 MB. /documents/index will display file size. If can
upload then the total usage is displayed. And error will be shown when
uploading a file that will total >25MB, or when the file is >8MB. Also
hard coded folder paths have been moved to static class functions.