Move to extension building process.

Going ahead with a pull-request, would fix #5.

Short summary of what this does, exactly.

1. It implements the ability to staticly, yes *staticly* build php_winbinder into your php distribution thus removing the need for an external DLL (makes it much smaller aswell).

2. Much faster compile time, and less of a hassle to build it. (Much easier for "noobs" to build it)

3. ~~Drops Windows XP targeting (Since; 1. Windows XP isn't supported by Microsoft anymore, and 2. PHP 5.5, 5.6 don't support it. Times are changing). Instead it now targets Windows 7.~~

4. Enhances some of the code, including removing some repetitiveness.

5. Removes pre-built binaries being in the git. It's usually bad practice to include compiled code in a source control system. That's what github release are for. On a new release, include the dlls with it! (Of course, this is a matter of opinion)