Remove duplicate permissions set

They are set earlier - before the InnoSetup build. This one would fail
because the local user does not own the files.
Fix filename case error

The AHK build script outputs with lower case. It's not problematic for
InnoSetup because it runs under Wine.
Use existing "require" and "makeBuildDir" from common
Heredoc is preferable to echo block

nc doesn't need - to read from stdin
Test quoted string for emptiness

Recommended by http://tldp.org/LDP/abs/html/comparison-ops.html
Update bookmark editions before tagging a new build