Conflict warning Messaging and ssZeds package

Client will give warning when trying to build with both the Messaging
and ssZeds package selected.
Merge pull request #120 from gdscei/1.7.5

Conflict warning Messaging and ssZeds package
Added Update BE Scripts + added perl to all commands

Added "Update BE Scripts" in the Setup window.
Added 'perl' to all command-line commands regarding any of the perl
files, for possible compatibility fixes.
Update README.md
Merge pull request #121 from gdscei/patch-1

Update BE Scripts option to Client + compat. fix for perl
Merge pull request #21 from thevisad/1.7.5

1.7.5