- fixed user styles in base theme
    - added new divs for better control on user profile and user index pages
    - reduced data on course user profiles down to minimum
    - removed user/tabs.php completely and all uses of it
    - changed default user icon pix to something very bland (bye bye smiley cake)

MDL-14534 - now you can remove 'Not selected' option

print_courses() produced PHP notice (Trying to get property of
non-object) and generated an invalid button to create a new course in this
case: (1) Passed paramater $category is 0 to display all categores (as in
case of home page, for example) and (2) get_child_categories(0) returns
more than one record. In such case, $categories is still a plain
integer, does not contain ->id property and the called /course/edit.php
exits with error.
This patch uses $CFG->defaultrequestcategory as category id in this
case.

Adding some strings

Formatting the code

MDL-19168, dropbox repository plugin for moodle, and oauth support for filepicker. dropbox plugin has a known bug: cannot access folders or files with space, using urlencode to encode filepath is not helping, needs to contact dropbox team to find workaround

Fixing this problem.

hub server MDL-19311 add some code to the index page to display the hub course list in case the hub plugin is installed + improve community block search form (subject + language)

navigation MDL-22425 Fixed courses not being shown to logged in users and removed all traces of mymoodleredirect settings

MDL-22395 - fix mod/scorm to pass 1.2 tests again. issues with iframe vs object in IE, JS finding content ids, and url_pix().

MDL-14534 - now you can remove 'Not selected' option

navigation MDL-22425 Restructured navigation for the nth time plus performance tweaking and course display limit