Fixed NzString::ToDouble rejecting legal strings
NzString::Clear can now keep the internal buffer to improve performances
NzStringToNumber now takes an optional argument to check if the
conversion went well
Optimized NzString::ToInteger
Added pixel format support
Added MemoryStream
Added Rect
Added ResourceLoader
Added generic loader (bmp, gif, hdr, jpg, jpeg, pic, png, psd, tga)
Added PCX loader
Added utility module initializer
Fixed Config.hpp include
Prerequesites.hpp now overwrites _WIN32_WINNT when defined
version is less than requiered version
Renderer's initialisation will implicitly initialize utility module
Removed RENDERER_SINGLETON option
Shaders are now resources