Windup 0.2

This is windup v0.2. To use, download windup.exe to a directory of your choice where you want to install WinDbg. The directory must be writable when running windup. Use windup.exe to launch windbg and it will check for updates each time it is launched. If an update is available, the current version will be run and the new version will be downloaded and installed in the background.