Migration to C++11 shared_ptr

[lwho]

http://pioneerspacesim.net/forum/viewtopic.php?f=3&t=267

Migration steps for a class

1. Derive class from std::enable_shared_from_this
2. RefCountedPtr<Class> to std::shared_ptr<Class>
3. shared = bare_ptr->shared_from_this(); where necessary (there must already be a shared_ptr for the object.

   Current RefCounted classes

   • [ ] CameraContext
   • [ ] CollMesh
   • [ ] FileSystem::FileData
   • [ ] Galaxy
   • [ ] GalaxyGenerator
   • [ ] GalaxyObjectCache::Slave
   • [ ] GasPatchContext
   • [ ] GeoPatchContext
   • [ ] Graphics::GL2::RenderBuffer
   • [ ] Graphics::IndexBuffer
   • [ ] Graphics::Material
   • [ ] Graphics::Texture
   • [ ] Graphics::VertexBuffer
   • [ ] Random
   • [ ] SceneGraph::Node
   • [ ] Sector
   • [ ] StarSystem
   • [ ] SystemBody
   • [ ] Terrain
   • [ ] Text::DistanceFieldFont
   • [ ] Text::TextureFont
   • [ ] UI::Animation
   • [ ] UI::Widget