Autocomplete massive update

Autocompletion has been massively updated, now it should work a lot
better!
It is also more organised than before, so working with the code should be easier, and faster

Autocomplete added

Autocomplete setting added (enabled by default) and also another setting
to toggle imports using on the fly

CSMD

CST files improved. Now you can type any code in a .cst file without the need of adding all
the usings, nor "namespace Foo", nor "public class Bar". You can just
type the code you wish to execute.

For example:
Before:

using System;

namespace Foo {
    public class Bar {
        static void Main(string[] args) {
            Console.WriteLine("Hello!");
            Console.ReadKey();
        }
    }
}

Now:

Console.WriteLine("Hello!");
Console.ReadKey();

Initial Release

This is the first CSMD release.

Includes

• Compile C# code from the CSMD console
• Save code snippets anywhere and execute these in any computer with CSMD
• Change the .Net framework target version
• Decide whether create a temporal executable file or not
• Add references to external libraries