GCB MyStuff Installer

The original MyStuff installer made use of a generic Toppy Installer developed by EMJB.
It's multiple installer scripts were created/maintained by ChunkyWizard (CW).
These scripts loaded files from multiple web sites (at least one of which no longer exists)
The original installer needed to be connected to the internet during the install.

BuildOfflineMyStuffInstaller.exe was developed when the original installer stopped working.
However, this has some issues e.g. only Option 1 of the 3 installation options worked and occasionally, one could "lose" the installation window.

The new installer is written solely for installing/upgrading MyStuff i.e. it can't be used for installing anything else.
It's single script uses the concepts developed by CW and EMJB but also provides some new constructs.
The script loads files from just two websites (GeeCeeBee.co.uk and Gramp's logos site).
It can generate a zip file that can be used on an offline pc.
The new installer extracts the installation script from it's executable (the original installer downloaded the scripts)

The new installer eliminates many unnecessary questions including  
* Not asking about deleting non-existent MyStuff 6.4 backups.
* Automatically updating  taps and tap packages (eg FontManager) i.e. a detected tap is always upgraded to the latest version