(Fiddler4) Added uninstall key for 32 bit machines

As pointed out during moderation, the uninstallation script would not
work on a 32 bit machine.  Added a check to see whether running on 32 or
64 bit machine, and used correct key.
Merge branch 'master' of https://github.com/chocolatey/chocolatey-coreteampackages
(DotNet4.0) Adding source files for common package

- Some time ago, a package for DotNet4.0 was requested after discussion with Rob and Matt
- It was created by @gep13 and hosted in his repository
- It was intended that this package should never really be used, but that it should be added for completeness sake
- I am moving it here as this repository is a better fit for this package, rather than personal repository