And rearrange files to work with the new layout for the finalized upgrader

The upgrader can't (and shouldn't) do everything necessary to complete an
upgrade. The adminsitrator will need to take care of a few extra tasks that
are outlined in the UPGRADING.txt file. One of the items includes removing
source code no longer used in the 1.7 codebase. A script is shipped (Unix
only) that allows an administrator to automatically clean up all old source
files that are no longer used.

Allow staff members the ability to select a default paper size which will be
used in printing tickets via PDF. In the future, this may be overridden per
ticket by a dialog box at print time.

Add the ability of revoking previous ticket state tracking events when new
events are logged for the same ticket. This will allow, for instance, the
ability to revert the 'closed' state of a ticket when the ticket is
reopened.

For statistics tracking, a user could configure whether or not the events
should be counted for each event tracked or just the non-annulled events.
For instance, if a ticket is closed and reopened several times, only the
very last closed event should count toward the statistics for the ticket.
Therefore, when a ticket is reopened, previous closed events should be
marked as annulled.

And correct several undefined function errors from several source files. So
while function names in PHP are considered case-insensitive, it still makes
sense to use consistent camel casing for both defining and calling methods.
The lint test searches the code base for method calls, and then searches the
code base again looking for a function definition matching the name of the
function invoked. It's not failsafe, because it doesn't detect the class
from which the method should belong, so it's likely to have false negatives.
Furthermore, it won't work well for PHP 5 where several classes are built
into PHP (and aren't searchable in the osTicket code base).

Remove the include/staff/api.inc.php as it no longer appears to be used (and
contains references to undefined methods).