Improve support for try-catch statements

[hazzik]

Now it will generate main body of try-catch statement instead of throwing exception

Func<int, int> compiled = x =>
{
    try
    {
        return x * 2;
    }
    catch (ArgumentException)
    {
        return -1;
    }
};

Would be decompiled to Expression<Func<int, int>> dc = x => x * 2.