Core: Fix build and proper deinitialization in HandleTransmogrifyItems (by using vectors instead of new/delete)
Core/Movement: Ensured object orientation is always within 0-2pi range, this fixes movement.
Core/PacketIO:

- Enable a bunch of spline packets.
- Correct emblems written in SMSG_GUILD_INVITE
- Revert changes in GuildCommandType and add more errors to GuildCommandError
- Rename Powers to match names in Lua code from client
Merge remote-tracking branch 'origin/master' into 4.3.4
Core: Add missing include
Core/PacketIO: Enable few more opcode handler (fixes mailing and others)
Core/Movement: Implemented creature slow fall movement
Core/PacketIO: Enable most arena related opcodes
Core/PacketIO: Added WriteString method to ByteBuffer allowing to write strings without null-terminating them
Core/Misc: Use ByteBuffer's WriteString where possible/needed
Core/PacketIO: Enable 2 opcode handlers, remove legacy HandlePageQuerySkippedOpcode
Core: Cleanup whitespace, fix build and enable 1 opcode
Core/PacketIO: Cleaned up manual shifting for account name length reads in CMSG_AUTH_SESSION
[Object]: at teleportaion transform orientation to 0-2pi range. As we cat set bad orientation to plr by transport teleportation or bad db data.
+ additionally check orientation at loading, for priventing loading bad orientation (Fix Freeze at loading in some cases)
Core/PacketIO: Enabled more opcodes
Core/PacketIO: Enabled one more opcode
Merge remote-tracking branch 'origin/master' into 4.3.4
Core/Achievements: Compile fix by o0Loco0o
Compile fix for gcc 4.5 and newer
Core/PacketIO: Updated player move speed change packet structures