Core/Players: Fixed Death Knight starting First Aid skill max value
Core/Dependencies: Clean up recastnavigation folder

Remove old files from recastnavigation folder and update the structure to the same of https://github.com/memononen/recastnavigation/ to allow easier updates.
Merge branch 'master' of github.com:TrinityCore/TrinityCore into 4.3.4

Conflicts:
	dep/PackageList.txt