Looking for MacOs and/or Godot and/or CEF developer

[Lecrapouille]

Currently:

• the CEF does not work for MacOs. Some parts need C# code and some knowledge is needed for exporting the project with Godot. Added MacOS support #73
• Some Godot code needs to optimized (too many copies of textures and only a part shall be refreshed):

  gdcef/addons/gdcef/gdcef/src/gdbrowser.cpp

  Line 134 in ad2bb3d

  //------------------------------------------------------------------------------

• Add a add blocker. Prototype started here https://github.com/stigmee/gdnative-cef/tree/dev-extensions

Helps wanted :)

[Lecrapouille]

Optimized onPaint done in #48 thanks to @eliopark-nsuslab

[Lecrapouille]

MacOS done in #73 thanks to @eliopark-nsuslab