section not always moved when requested - page reloading prevented by anchor; added random parameter to force reloading; merged from MOODLE_16_STABLE

Removing the <a name="2"></a> anchors from course sections (used with links,
e.g. /course/view.php?id=2#4). We already have elements with id="section-XXX",
so I made all links I could possibly grep for point to those.

All this for XHTML (won't Tidy ever be content?)

the multilang filter. Bug 4341.
(http://moodle.org/bugs/bug.php?op=show&bugid=4341)

Merged from MOODLE_15_STABLE

Replaced with more secure alternatives.

The summary in the week or topic description was just written out as text without a class. I added a DIV class="summary" around it.

The up and down arrows for moving sections now jump to the moved section when the page reloads. Makes it easier to move sections over longer distances. I actually thought I had fixed this a long time ago but apparently not.

You know you are beyond hope of redemption when you make "API uniformity" changes. ;-)

Since $PAGE knows where the adminblock should be printed, let it do the printing.

   - remove most of the table properties
   - add new classes where necessary to let CSS in
   - rewrote all the PHP strings using '' for speed.

Improvements in how incoming parameters are handled, how $editing is handled.
More consistency across course formats for editing stuff, using $PAGE.

Also a "bugfix": when turning editing off, cancel moving an activity if you
were in the middle of doing so.

Lots of improvements in markup and styles for courses.
Finalized and correctly distributed the calendar styles.

Vastly improved styles, lots of inline styles removed, markup improved.