[0473] Applied CMaNGOS update z2451
 [z2451] Big rename of creature_template fields.

Also renamed core part to have same field name than sql.

Added new fields will be used in near near future for new stats system.

Please refer to http://cmangos.net/thread-431.html for more informations.

Thank to all involved on this.

Signed-off-by: cala <calaftp@free.fr>
[0474] Applied CMaNGOS core update z2452
[z2452] Loading/reloading classlevelstats.

Simple function to load and reload creature_template_classlevelstats table.
Also add getter.
Part 2/3 of new stats system.

Thank to @Schmoozerd

Signed-off-by: cala <calaftp@free.fr>