[svn r261] Fixed debug info for integer and floating local variables, can now be inspected in GDB. Did a lot of smaller cleans up here and there. Replaced more llvm::Foo with LLFoo for common stuff. Split up tollvm.cpp.

module nested3;

void main()
{
    int i;
    void test()
    {
        i = 3;
    }
    test();
    assert(i == 3);
}