WiimoteReal: use inheritance instead of #ifdef

[Tilka]

The OS X implementation doesn't compile yet. Could someone familiar with Objective C please help me find a good way to solve this, @comex maybe? My primitive solution would be making the class variables public and casting the objects from the g_wiimotes list to WiimoteDarwin but I'm sure this can be done more elegantly.

[comex]

Probably easiest/nicest to have an unordered_map<IOBluetoothDevice*, WiimoteDarwin*>

[lioncash]

Shouldn't override be added to the inheriting class functions? This way you can drop the virtual

[comex]

Or maybe that would be overkill. Just casting should be fine, really, but the members should have m_.

Other people might say that there should be a getter, but they should die in a fire.

[Tilka]

Addressed comments.

[degasus]

LGTM but the osx part. I have no clue what we're doing there :D

[PatrickFerry]

@comex Haters gonna hate. What's so bad about getters?

[Tilka]

Rebased. Derived destructors need to call Shutdown() now because it calls virtual methods. Is this acceptable?

[Tilka]

Split into separate commits. This should make reviewing much easier.

[d112570]

After this update (4508) wii modes does not work correctly on the MacOsX (10.9.5). If you connect 1 Wiimode it works flawlessly, if you add another Wiimode, Wiimode 1 Freezes, Wiimode 2 Works. If you disconnect Wiimode 2, Wiimode 1 will unfreeze. Can you undo this update? Dolphin 4508 and up now only work with one Wiimode, Dolphin 4503 and below all work with 2 or more Wiimode. On MacOsX Yosemite (10.10.x) Wiimodes no longer work for any version, so don't update to MacOsX 10.10 until this is resolved.

[magumagu]

Please file a bug in the issue tracker (http://code.google.com/p/dolphin-emu/issues/list); comments on already-merged PRs are not a good way to track issues.