CSharp parser performance

[Adam Treat]

Hi all,

I was testing the C# parser and found that I can parse every file in Mono's 
corelib (minus the tests) and start the KDevelop 4 project in less than 5 
seconds.

I've also determined that the C# parser suffers multi-threading problems.  
When I run more than one parse at a time in multiple threads, I get crashes.  
This probably has to do with the static variables.  Especially the 

char *_G_contents;

variable.

TODO: make the parsers threadsafe.

Jakob, I'm also going to work on the kdevelop-pg serialization of AST's.

Cheers,

Adam