Replace call by address with function name

Call news_item_get_subject_location by name rather than its address.
Also add short description of function
Merge branch 'master' of https://github.com/ZedThree/OpenRCT2 into ZedThree-master
add additional authors in source code headers
Merge branch 'master' of https://github.com/IntelOrca/OpenRCT2.git