Merge pull request #10 from azeckoski/master

Fixed a bug with PDO exception handling (plus some cleanups)
More moving of functionality to classes.
Remove some of the deprecated static covers.
Remove the deprecated covers for the paged tables.
Remove the getSpinnerUrl static covers.
Remove no longer used static covers.
Rename LTIDB to LTIX
Remove all the \Tsugi\LTI covers
Remove one more cover. The next few will be harder to remove.
One more unused cover down.   A few more to go.
Fix a bug and remove one more static cover.
Rationalize when we require class files so that we never include
one in whilst in a namespace.  Seems like different versions of PHP
freak out different ways.
More rationalization of the include patterns.
Rename a method, use the self:: more effectively.
First step in removing the pdo* covers.
Major switch from passing $pdo around in parameters and
switch to using $PDOX globally.
Remove that last pesky cover.