Patch to build C# Sqlite with Mono.

[Miguel de Icaza]

Hello,

    This patch makes C# Sqlite build with Mono.

    Mono's compiler is a bit stricter with the processing of regions that are ignored at the preprocessor level.   Microsoft's C# compiler ignores any errors in preprocessor use inside regions like:

#if false

#invalid-preprocessor-directive

#endif


    Mono's C# compiler requires that the preprocessor directives are valid, in this particular context, this means that it is not legal to #define new values insde and #if block if a token has been parsed by the compiler, so all the #if foo #define #endif blocks have been moved to the top of the file.   

    Additionally, this fixes the shell compilation errors (missing refs).

Miguel.

[Noah]

I've incorporated your changes with the new baseline and LF changes.
I'll post later tie morning.
Please download new sources later today and test inder Mono

>  work-on-mono.diff
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