Core/Players: Cast Summon Pet on first login, relocate created pets

*Casts a proper Summon Pet spell on a hunter logging in for the first
time (depending on his race).
*Relocates created tamed pets before they're added to map.
DB/Spells: Fixed server startup after 492c695021a220.
DB/Quests: Fix: The Focus on the Beach, Atop the Woodlands, The End of the Line

Closes #367 #1848
Core/StatSystem: Implemented mastery.