Corrected opcodes:
- SMSG_AURA_UPDATE
- SMSG_SPELL_GO
- SMSG_SPELL_START

Added handler for SMSG_AURA_UPDATE
Added more output data for SMSG_SPELL_GO & SMSG_SPELL_START
All changes for 5.3.0
Merge pull request #123 from zorix/PR11

Corrected opcodes: