Mark RubyInstaller.add_dll_directory as deprecated.
Mark RubyInstaller.add_dll_directory as deprecated.

The reason to not remove it immediately is, that there are at least two
gems out there that already use the function in released versions.
These are pg.gem and fxruby.gem. They needs to be adjusted.

oneclick/rubyinstaller2,larskanis/rubyinstaller2,larskanis/rubyinstaller2,oneclick/rubyinstaller2,oneclick/rubyinstaller2,larskanis/rubyinstaller2