Updated GetWorldInfo and fixed ChooseWorldBy methods.

Changed GetWorldInfo parameter name from World to WorldIndex to better represent its meaning.
Changed WorldRec.Number to return actual world number instead of parameter world index.

Fixed ChooseWorldBy to a working state, as previous version was not working due to being out of date.

Signed-off-by: idynin <ilya@idynin.com>
Fixed comment block for GetWorldInfo to reflect the function signature.

Signed-off-by: idynin <ilya@idynin.com>
Merge pull request #157 from idynin/master

Updated GetWorldInfo and fixed ChooseWorldBy