Add FreeImage binding (currently Windows-only).
Little cleanup.
Merge pull request #23 from p0nce/master

FreeImage loader
Minor fixes to the FreeImage binding.

Fixed a couple of frustrating forward reference errors by moving the import of derelict.freetype.types beneath the import of derelict.freetype.functions in freeimage.d. So the functions p0nce had commented out as a workaround are no longer commented out.
Changed a few const parameters & return values in freetype.functions.
In the build script, changed the "DerelictFreeGlut" package name to "DerelictFG".
Removed the custom c_long alias and replaced it with core.stdc.config.
add of whole lot of missing bindFunc calls single out problem function: what size are C vararg on the stack?
Untested fix for loading of FreeImage_OutputMessageProc
glDepthMask was missing, as per pull request from Chabsf
Corrected a typo introduced in the last commit.
glShaderSource now is declared to take a const(char)** instead of a const(char*)*
Added /usr/lib/local/libglfw.so to the default search path in DerelictGLFW3.
Minor enhancement to DerelictGL3.

Add function pointers for wglChoosePixelFormatARB and wglCreateContextAttribsARB in wgl.d
Add function loadWGLContextCreators to load those two functions. Call DerelictGL3.load, create a classic context, then call loadWGLContextCreators. The two functions can then be used to create a modern 3+ context.
Fix for the breakage of the DerelictFI build that happened in a previous commit.
Uncommented some functions in DerelictFI that had been commented out because of compiler errors that have since been fixed.
Updated the build script.

Renamed from derelict.d to build.d.
When specifying package names, the 'Derelict' prefix is no longer accepted. Now, just give the package name (GL3, Util, SDL2, etc..). And it's case insensitive, so gl3, utiL, and SdL2 all work.
correct signature for SDL_GL_MakeCurrent
Merge pull request #26 from p0nce/patch-1

correct signature for SDL_GL_MakeCurrent
Now should compile with the latest dmd git-master.

Fix to work around DMD issue 8258: ( http://d.puremagic.com/issues/show_bug.cgi?id=8258#c3 ), which appears to be not a bug.
Merge branch 'master' of github.com:aldacron/Derelict3
Added posix lib names for DerelictFI.