add mollie plugin

plugins/mollie/foodsoft_mollie.gemspec

@@ -0,0 +1,20 @@
+$:.push File.expand_path("../lib", __FILE__)
+
+# Maintain your gem's version:
+require "foodsoft_mollie/version"
+
+# Describe your gem and declare its dependencies:
+Gem::Specification.new do |s|
+  s.name        = "foodsoft_mollie"
+  s.version     = FoodsoftMollie::VERSION
+  s.authors     = ["wvengen", "yksflip"]
+  s.email       = ["dev-foodsoft@willem.engen.nl", "foodsoft@yksflip.de"]
+  s.homepage    = "https://github.com/foodcoops/foodsoft"
+  s.summary     = "Mollie payment plugin for foodsoft."
+  s.description = "Integration with Mollie payments."
+
+  s.files = Dir["{app,config,db,lib}/**/*"] + ["LICENSE", "Rakefile", "README.md"]
+
+  s.add_dependency "rails"
+  s.add_dependency "mollie-api-ruby"
+end