Includes fixes and improvements to the asset manager, shop, and the syndicated content asset.

Changelog:

7.5.16
 - Created a migration from 7.4.40 directly to 7.5.16.
 - fixed: transactions lost during 7.5.11 upgrade
 - Fixed a problem where shop could create internal server errors instead of
   catching the exceptions.
 - Made the iTransact terminal link a button that automatically logs you in.
 - iTransact now more gracefully handles recurring payment postback errors.
 - fixed: More permissive DSN checking to allow use of SQLite (thanks pathma)
 - fixed: Project manager modal dialog doesn't work in some instances.
 - fixed: Syndicated Content doesn't always decode text properly
 - fixed: Syndicated Content caches improperly
 - added File::Path 2.04 as a prerequisite
 - fixed: Asset Manager shows data error when no child assets to display
 - changed: show 25 items per page in asset manager
 - fixed: Asset Manager buttons now work in IE6
 - fixed: Donation: Add to Cart still visible in Thank You Message screen
 - optimized PurgeOldInboxMessages workflow
 - fixed: Calendar: Reorder Events in Week View Broken
 - Added more information about workflow instance errors, so we can debug without having 
   to watch SPECTRE's debug output.
 - fixed: List style Content profile fields broken
 - Added additional error messages
 - fixed: Added a friendly message so when a user who approves a version tag, 
   but cannot view the version tag (is not in Turn Admin On group), they do 
   not see "Permission Denied"