refs #2653 - set configuration for newsletter @install time
refactor :D
Merge pull request #103 from claudiaifrim/ticket_2653

Ticket 2653 - refs #2653 - set configuration for newsletter @install time
refs #2653 - fix for renamed fields (image field and summary field)
Merge pull request #104 from claudiaifrim/ticket_2653

refs #2653 - fix for renamed fields (image field and summary field)
refs #2653 - add required fields to Simplenews Content Selection view mode
Merge pull request #105 from claudiaifrim/ticket_2653

refs #2653 - add required fields to Simplenews Content Selection view mode
Added install/update scripts for windows