Merge pull request #356 from dmundra/hotfix/shibbolethfix

Fixed shibboleth target URL to go to the course selected on login.
Rough draft of new README.md file
Small change
typo in rendering
more proofreading
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Fix 2 bugs with LB1: hide problem buttons would sometimes delete too many problems or go into an infinite loop, the tag widget would sometimes delete lines from the pg file.
Fixed bug where mathview buttons weren't associated to multiple essay boxes.
- Test by making a problem with two essay boxes and checking that the mathview buttons are placed to the side of each box.
Cleaned up the collapse button a bit.
Fixed the depreciation warnings that Perl >5.16 was generating.
Made some improvements to how more like me works.  Now if you hide a more like me it hides the table (if closed) and moves the more like me button to the new top element (if appropriate).