Applied cmangos-classic update z1940

Rewrite and cleanup DB Script Engine
* Moved actual script processing code to ScriptMgr
* Unifed and improved log output. Now table-name is passed to each
script execution
* Added the "buddy concept" to all commands (except the outdated direct
field change commands):
Now all commands support to search a creature (or go for some commands)
in a radius, with which to do some stuff.
See doc/script_commands.txt in core repository (commit link below) for
more details and information
Attention DB Devs:
Current DB-Scripts are converted automatically as far as possible, but
some old target selecting mechanics were not reasonable to do automated.
For such cases the command is marked with data_flags & 0x10 (==16),
which will throw DB-Errors to track them down faster
Thanks to NeatElves and especially Grz3s for testing !
https://github.com/cmangos/mangos-classic/commit/69efb726db35b35a33fb2e1
3309163100619174b
Applied cmangos-classic update z1945

Improve SCRIPT_COMMAND_MOVE_TO
https://github.com/cmangos/mangos-classic/commit/bb1308baff2e1912574c096
0740748b83d19889a
Applied cmangos-classic update z1951

Remove .hover command
https://github.com/cmangos/mangos-classic/commit/30215795ae038ae450972f9
f772cb030566a748a