Updated README-DEV-OPENGL.txt
Event handling, CApplication and switch to c++-11

 - added/changed event structs and event queue in common/event.h
 - added event handling and some minor functions in CApplication
 - switched to --std=c++11 because of union in Event struct
Switched back to old standard; addded -Wall

- removed -std=c++11
- added -Wall and removed most reported warnings
Joystick polling with timer

- added joystick polling through timer
- updated documentation on CApplication class
Removed README-DEV-OPENGL to avoid confusion
CDevice interface and stub of implementation

- added CDevice abstract interface
- began implementation of CGLDevice
- added stub for Texture struct
- created CGLDeviceConfig
- changed particule -> particle & other minor changes
CGLDevice implementation

  - extended Gfx::CDevice interface
  - written OpenGL implementation in Gfx::CGLDevice
  - rewrote color and light module
  - added Gfx::VertexCol
  - added array casts to Math::Vector, Math::Matrix and Gfx::Color
Multitexturing support

- added CImage class for loading/saving images and a simple test for it
- added libpng library to build
- added Gfx::Texture struct
- updated the Gfx::CDevice interface to include new features
- implemented the new features in Gfx::CGLDevice
Merged changes from dev

Resolved conflicts & added fixes.
Fixed bug with texturing

- moved creation-time tex params to Gfx::TextureCreateParams
- fixed bug with texture creation
- added simple test for multitexturing
Refactoring in math & texture modules

- moved texture-related structs to texture.h & code to texture.cpp
- cleaned up texture test code
- added Math:: namespace qualifiers to math modules for clarity
Rewritten model loading

- written new implementation of CModelFile (old CModFile)
- added stringutils and ioutils in src/common
- removed old CModel (model viewer)
Minor changes

- moved mainpage src/doc/docmain.doc.txt to src/app/main.cpp
- removed old modfile modules from src/common
- removed Snd namespace in engine.h
Fix in model loading; simple model viewer

- fixed model loading code
- added simple model viewer (model_test) in src/graphics/opengl/test
- added system time stamp code
- split the code in app/system modules to separate headers
- added debug messages in model loading
- minor fixes in OpenGL engine
Fixes in texture loading

- added other texture formats: BGR and BGRA
- fixed texture loading in model viewer
- moved code from texture.cpp module to texture.h
Fixed OpenGL transformations

- fixed wrong order of transformations
- added transform_test
ComputeSphereVisibility function

- borrowed implementation of ComputeSphereVisibility from libwine
- added -lrt to Linux libs
Texture & mouse functions; refactoring & fixes

- cleaned up and added documentation to engine.h
- refactored CEngine interface and associated structs
- added mouse handling functions in CApplication & CEngine
- fixed bugs in projection matrix setting
- changed texture loading & handling
- added const-values in CDevice & CGLDevice
- changed event management in CApplication
- other minor changes & bugfixes
Cursor drawing

- fixed cursor drawing in CEngine
- changed event loop to generate more events
Refactoring of texture code

- refactored texture structs & functions
- added note about OpenGL extensions
- removed device.cpp as unnecessary
- minor changes in CEngine