Add module first version
Update module information
Change module filename
Delete unnecessary to_s
Don't allow 127.0.0.1 as SRVHOST
Check module references
Add save-as feature

The tool produces A LOT OF results so it's really painful to manually
copy and paste and to be able to use the data. So it should automatically
save.

Tagging the issue here because I forgot to do it:
Fix #4039
Only show bad refs when using -c
Fix typo
Fix bugs
fixes #4131, EXE::Custom NameError
Add an R in /Info for the trailer dictionary to make it readable
Land #4144, fix default template.pdf
Land #4110 - Citrix Netscaler BoF
Land #4138, @wchen-r7's reference cheking for module_reference.rb

* Fixes #4039
init exe as nil instead of ''
Land #4143, @kernelsmith's get_custom_exe fix

* Initializes the exe variable
* Fixes #4131