Tools/MeshExtractor: Do not delete the polygons before we are done using them.
Tools/MeshExtractor: Implemented the code to generate mesh files for continent maps.
Fixed a few more things
ToDo:
Test the generated navmesh.
Core/SAI: Properly implement the second parameter of SMART_ACTION_CALL_TIMED_ACTIONLIST to reflect the wiki (which also makes more sense)
Whitespace between string literals and user-defined literals is now mandatory for concatenation in C++11
Merge branch 'master' of github.com:TrinityCore/TrinityCore into string_concatenation
Merge pull request #10978 from NightQuest/string_concatenation

C++11 string literal concatenation