migrate to Rails 4.0 (closes foodcoops#214)

Conflicts:
	Gemfile.lock

spec/models/article_spec.rb

@@ -36,12 +36,12 @@ describe Article do
   end
 
   it 'keeps a price history' do
-    expect(article.article_prices.all.map(&:price)).to eq([article.price])
+    expect(article.article_prices.map(&:price)).to eq([article.price])
     oldprice = article.price
     sleep 1 # so that the new price really has a later creation time
     article.price += 1
     article.save!
-    expect(article.article_prices.all.map(&:price)).to eq([article.price, oldprice])
+    expect(article.article_prices.reload.map(&:price)).to eq([article.price, oldprice])
   end
 
   it 'is not in an open order by default' do

spec/models/order_spec.rb

@@ -23,7 +23,7 @@ describe Order do
     it 'is not closed by default'   do expect(order).to_not be_closed end
 
     it 'has valid order articles' do
-      order.order_articles.all.each {|oa| expect(oa).to be_valid }
+      order.order_articles.each {|oa| expect(oa).to be_valid }
     end
 
     it 'can be finished' do

spec/models/supplier_spec.rb

@@ -10,7 +10,7 @@ describe Supplier do
 
   it 'has valid articles' do
     supplier = create :supplier, article_count: true
-    supplier.articles.all.each {|a| expect(a).to be_valid }
+    supplier.articles.each {|a| expect(a).to be_valid }
   end
 
 end