Provide a default build type.

By default we will build in Release mode.

Signed-off-by: Daniel S. Reichenbach <daniel@kogitoapp.com>
Build binaries in same directory on Windows.

Windows binaries will all be built in bin/CMAKE_BUILD_TYPE now.

Signed-off-by: Daniel S. Reichenbach <daniel@kogitoapp.com>
Lua engine is now default, ScriptDev2 is disabled.

From now on, we build and ship the Lua engine Eluna by default,
and ScriptDev2 has been disabled.

You should start converting your C++ scripts to Lua, since SD2
will be phased out mangos-zero 0.20.

Signed-off-by: Daniel S. Reichenbach <daniel@kogitoapp.com>