Fix broken autorequires

Gemfile

@@ -11,7 +11,7 @@ if RUBY_VERSION < '1.9'
 end
 
 # AR
-gem "sqlite3-ruby", ">= 1.2.5"
+gem "sqlite3-ruby", ">= 1.2.5", :require => 'sqlite3'
 
 group :test do
   gem "pg", ">= 0.8.0"
@@ -19,18 +19,18 @@ group :test do
 end
 
 # AP
-gem "rack-test", "0.5.3"
+gem "rack-test", "0.5.3", :require => 'rack/test'
 gem "RedCloth", ">= 4.2.2"
 
 if ENV['CI']
   gem "nokogiri", ">= 1.4.0"
-  gem "memcache-client", ">= 1.7.6"
+  gem "memcache-client", ">= 1.7.6", :require => 'memcache'
 
   # fcgi gem doesn't compile on 1.9
   # avoid minitest strangeness on 1.9
   if RUBY_VERSION < '1.9.0'
     gem "fcgi", ">= 0.8.7"
   else
-    gem "test-unit", ">= 2.0.5"
+    gem "test-unit", ">= 2.0.5", :require => 'test/unit'
   end
 end