#497 Adding other Installer support

[john]

hey i was asking if you would support other installer to view there scripts like inno setup and wix also clickteam would be nice to support

[PopuriO2]

The latest installer using NSIS is 7-Zip 15.00 Alpha (I still have it, but only 32-bit version), this was before new installer until 15.05 beta.

I have been tried to compile using Inno Setup old version (5.5.9 or 5.6.1), just because I would try to experiment for some reason.

[john]

other version of 7zip don't support other installer besides nsis which is not what I'm after I'm talking about adding support to others