Fix some 1.8.7 issues

Gemfile

@@ -12,6 +12,7 @@ gem "cucumber", "~> 1.2.1"
 gem "fivemat",  "~> 1.1.0"
 gem "aruba",    "~> 0.5.1"
 gem "rspec",    "~> 2.12"
+gem 'gherkin', '<= 2.11.6' # for annoying "eval" warnings
 
 # Optional middleman dependencies, included for tests
 gem "sinatra"

middleman-more/features/markdown.feature

@@ -6,6 +6,7 @@ Feature: Markdown support
     When I go to "/index.html"
     Then I should see "<p>Hello World</p>"
 
+  @encoding
   Scenario: Markdown extensions (Maruku)
     Given the Server is running at "markdown-app"
     When I go to "/smarty_pants.html"

middleman-more/lib/middleman-more/extensions/automatic_image_sizes.rb

@@ -54,7 +54,7 @@ module Middleman
             end
           end
           
-          params = params.delete_if {|key| key == :supported_extensions }
+          params.delete(:supported_extensions)
 
           super(path, params)
         end