Fuzzylite5.0

This pull request does three things, split into three commits:

 - it allows to use the system version of fuzzylite instead of the embedded copy in vcmi. This allows for example Debian to remove the embedded copy of fuzzylite to not ship a duplicated copy
 - it replaces the embedded copy of fuzzylite in vcmi with version 5.0
 - it changes vcmi so that it compiles with fuzzylite 5.0

The last commit was created by Juan Rada-Vilela who is the author of fuzzylite. As he has an incentive to see fuzzylite and one of its users (vcmi) in Debian, he offered to create this patch - many thanks to him!

Please check if everything is in order because neither Juan nor me have a deep understanding of how vcmi uses fuzzylite.