Added global verbose setting.
Added local version of global verbose setting.

The global version of this setting is essentially just the default value.  The
version stored in the LootGain_CharacterData setting influences the behavior
of the addon.
Fill in missing character settings in Initialize.
Removed some debug printouts that are not needed.
Moved most of the initialization to Initialize.

The addon previously did most of its set up in the OnLoad function.  However,
this event happens before addons are loaded and teh player has fully entered
the world.  To be more robust, most of the set up is now performed in the
Initialize function.
Moved purging old units to Initialize function.
Removed extra printout in LoadSavedVariables.
Added check for verbose setting before printing.

Only print a message if the character has settings and set verbose to true.
If verbose is false, do nothing.
Only load variables when this addon is loaded.

The ADDON_LOADED event fires for each addon that is loaded, so check the
arguments provided to the OnEvent handler and confirm the event is being
thrown for this addon.
Use correct count for quest items in data.

Bug here was making a local "count" variable be used when saving loot data, so
all quest items were always getting a count of zero.
Increment data version to 2.

This version provides the correct value for the count of quest items in the
character's containers.