BUGFIX: redis-rails has always been a problem child

implemented an ActiveSupport::Cache::Store for our internal use.
* allows for expire by family
* works correctly in multisite
* namespaced correctly

Removed redis-rails from the project, no longer needed

spec/components/cache_spec.rb

@@ -7,23 +7,27 @@ describe Cache do
     Cache.new
   end
 
-  it "can delete by family" do
-    cache.fetch("key2", family: "my_family") do
-      "test"
-    end
+  it "can be cleared" do
+    cache.write("hello0", "world")
+    cache.write("hello1", "world")
+    cache.clear
 
-    cache.fetch("key", expires_in: 1.minute, family: "my_family") do
-      "test"
-    end
+    cache.read("hello0").should be_nil
+  end
+
+  it "can delete by family" do
+    cache.write("key2", "test", family: "my_family")
+    cache.write("key", "test", expires_in: 1.minute, family: "my_family")
 
     cache.delete_by_family("my_family")
+
     cache.fetch("key").should be_nil
     cache.fetch("key2").should be_nil
 
   end
 
   it "can delete correctly" do
-    r = cache.fetch("key", expires_in: 1.minute) do
+    cache.fetch("key", expires_in: 1.minute) do
       "test"
     end
 
@@ -32,8 +36,9 @@ describe Cache do
   end
 
   it "can store with expiry correctly" do
-    $redis.expects(:get).with("key").returns nil
-    $redis.expects(:setex).with("key", 60 , "bob")
+    key = cache.namespaced_key("key")
+    $redis.expects(:get).with(key).returns nil
+    $redis.expects(:setex).with(key, 60 , "bob")
 
     r = cache.fetch("key", expires_in: 1.minute) do
       "bob"
@@ -42,8 +47,9 @@ describe Cache do
   end
 
   it "can store and fetch correctly" do
-    $redis.expects(:get).with("key").returns nil
-    $redis.expects(:set).with("key", "bob")
+    key = cache.namespaced_key("key")
+    $redis.expects(:get).with(key).returns nil
+    $redis.expects(:set).with(key, "bob")
 
     r = cache.fetch "key" do
       "bob"
@@ -52,8 +58,9 @@ describe Cache do
   end
 
   it "can fetch existing correctly" do
+    key = cache.namespaced_key("key")
 
-    $redis.expects(:get).with("key").returns "bill"
+    $redis.expects(:get).with(key).returns "bill"
 
     r = cache.fetch "key" do
       "bob"