We already link SDL2_test by default now.
Added some extra protection to notify the developer if they haven't initialized the application properly.

This will help reduce issues like that reported in bug 1819:

Wouter van Oortmerssen 2013-04-23 20:12:07 EDT
#0  0x01d1e881 in __HALT ()
#1  0x01c58971 in _CFRuntimeCreateInstance ()
#2  0x02e4acc1 in GSFontCreateWithName ()
#3  0x00adc0e1 in UINewFont ()
#4  0x00adc24c in +[UIFont systemFontOfSize:traits:] ()
#5  0x00adc298 in +[UIFont systemFontOfSize:] ()
#6  0x009fb5d9 in +[UITextFieldLabel defaultFont] ()
#7  0x00a8ccd5 in -[UILabel _commonInit] ()
#8  0x00a8ce14 in -[UILabel initWithFrame:] ()
#9  0x00a052eb in -[UITextField createTextLabelWithTextColor:] ()
#10 0x009fbede in -[UITextField initWithFrame:] ()
#11 0x00152ead in -[SDL_uikitview initializeKeyboard] at /Users/aardappel/lobster/external/SDL-2.0.0-7046/Xcode-iOS/SDL/../../src/video/uikit/SDL_uikitview.m:208
#12 0x0015290c in -[SDL_uikitview initWithFrame:] at /Users/aardappel/lobster/external/SDL-2.0.0-7046/Xcode-iOS/SDL/../../src/video/uikit/SDL_uikitview.m:50
#13 0x00153b5b in -[SDL_uikitopenglview initWithFrame:scale:retainBacking:rBits:gBits:bBits:aBits:depthBits:stencilBits:majorVersion:] at /Users/aardappel/lobster/external/SDL-2.0.0-7046/Xcode-iOS/SDL/../../src/video/uikit/SDL_uikitopenglview.m:53
#14 0x001524ff in UIKit_GL_CreateContext at /Users/aardappel/lobster/external/SDL-2.0.0-7046/Xcode-iOS/SDL/../../src/video/uikit/SDL_uikitopengles.m:114
#15 0x0015078f in SDL_GL_CreateContext at /Users/aardappel/lobster/external/SDL-2.0.0-7046/Xcode-iOS/SDL/../../src/video/SDL_video.c:2666
#16 0x000d8c5c in SDLInit(char const*, vec<int, 2>&) at /Users/aardappel/lobster/dev/xcode/lobster/../../src/sdlsystem.cpp:193
This patch isn't needed because you have the window and can do [nswindow contentView] yourself.
I'm rolling this back so we minimize the things exposed that we have to keep consistent in the API.
Need to include SDL_main.h when we call SDL_main()
The jump hack is no longer used.

Cheers!
Fixed compile errors on iOS
Added testautomation to the Visual Studio 2008 project.
Removed obsolete NoStdio configurations.
Fixed building tests on iOS
Removed obsolete testsdl target
Fixed compiling iOS demos
Remove unnecessary debugger detection logic again from Win32 SDL_LogOutput