Use performSelectorOnMainThread when available (>= 10.2) to create
  the window from the main thread. Also fixed a couple warnings

   fixes dvb on x86_64 architecture.

   requested. Fixes the build of plugins on x86_64 architecture.

Not sure it's the proper way,though (basically, simply don't override the length)

* fixed erroneus Spanish translation of TTL, thanks to the forum-user "martintxo" for the hint

* modules/gui/wxwindows/video.cpp: fixed problem where sometime the video doesn't start at the right size.

* modules/gui/wxwindows/interface.cpp: work-around for non working wxToolBarToolBase::SetNormalBitmap() in wxGTK.

Closes #2