Remove unused connection strings (North Central US). The databases have been
removed.
- Checkin in Web.config for setting expiration on static content.
- Modify solution to include book.png, book_cover.png and book_toc.png
Ticket #8: Fix issue where students are able to view the content of courses
they are not registered for.

CR: Arvind.
Fix broken image.
Merge branch 'master' of collegenextgen.unfuddle.com:collegenextgen/linkinks
Merge branch 'master' of collegenextgen.unfuddle.com:collegenextgen/linkinks
Merge branch 'master' of collegenextgen.unfuddle.com:collegenextgen/linkinks
Bug fixes for Refresh Book

1. The Book -> Refresh confirmation page had the button incorrectly
labeled as 'Delete
2. Fixed a bunch of metadata bugs related to Refresh and Delete
codepaths
3. Fixed ordering issue in the table of contents page
4. Fixed Web.config to include the "persist security info" flag. Without
this, you cannot make DB schema changes from the code