This is a fork of the original PhatStudio open source project found here: (http://phatstudio.sourceforge.net/). I'm not sure if the project is still active or not, but the installer does not install the add-in for Visual Studio 2012. This fork is meant to address that.
I have included the 1.0.11 version of PhatStudio as a download which will now install itself for Visual Studio 2012 (in addition to previous versions)
As I discovered there are a few dependencies if you want to build the MSI installer yourself. You'll need to download Blinksync as well as Inno. The /setup folder contains the phatstudio.iss file. You may need to modify the BuildSetupPackages.cmd file as well, depending on where you install the dependencies.
I guess the original version is GPL. I'm not sure what that means in terms of my obligations. Hopefully having the source here is sufficient. I believe the GPL license is viral so I presume this fork is also GPL? If not, do whatever you want with it :)