Updated Gemfile to include ~> 3.0pre so pre-releases are considered.

[fixes #24]

Gemfile

@@ -1,6 +1,6 @@
 source :gemcutter
 
-gem "activerecord", "~> 3.0"
+gem "activerecord", "~> 3.0pre"
 
 group :development do
   gem "rake"

Gemfile.lock

@@ -1,30 +1,34 @@
 GEM
   remote: http://rubygems.org/
   specs:
-    activemodel (3.0.6)
-      activesupport (= 3.0.6)
-      builder (~> 2.1.2)
-      i18n (~> 0.5.0)
-    activerecord (3.0.6)
-      activemodel (= 3.0.6)
-      activesupport (= 3.0.6)
-      arel (~> 2.0.2)
-      tzinfo (~> 0.3.23)
+    activemodel (3.1.0.rc4)
+      activesupport (= 3.1.0.rc4)
+      bcrypt-ruby (~> 2.1.4)
+      builder (~> 3.0.0)
+      i18n (~> 0.6)
+    activerecord (3.1.0.rc4)
+      activemodel (= 3.1.0.rc4)
+      activesupport (= 3.1.0.rc4)
+      arel (~> 2.1.1)
+      tzinfo (~> 0.3.27)
     activerecord-jdbc-adapter (1.1.1)
     activerecord-jdbcmysql-adapter (1.1.1)
       activerecord-jdbc-adapter (= 1.1.1)
       jdbc-mysql (~> 5.1.0)
-    activesupport (3.0.6)
+    activesupport (3.1.0.rc4)
+      multi_json (~> 1.0)
     archive-tar-minitar (0.5.2)
-    arel (2.0.9)
-    builder (2.1.2)
+    arel (2.1.1)
+    bcrypt-ruby (2.1.4)
+    bcrypt-ruby (2.1.4-java)
+    builder (3.0.0)
     chronic (0.3.0)
     columnize (0.3.2)
     delorean (0.2.1)
       chronic
     factory_girl (1.3.3)
     git (1.2.5)
-    i18n (0.5.0)
+    i18n (0.6.0)
     jdbc-mysql (5.1.13)
     jeweler (1.5.2)
       bundler (~> 1.0.0)
@@ -33,6 +37,7 @@ GEM
     linecache (0.43)
     linecache19 (0.5.12)
       ruby_core_source (>= 0.1.4)
+    multi_json (1.0.3)
     mysql (2.8.1)
     mysql2 (0.2.7)
     pg (0.9.0)
@@ -56,14 +61,14 @@ GEM
     sqlite3 (1.3.3)
     sqlite3-ruby (1.3.3)
       sqlite3 (>= 1.3.3)
-    tzinfo (0.3.26)
+    tzinfo (0.3.28)
 
 PLATFORMS
   java
   ruby
 
 DEPENDENCIES
-  activerecord (~> 3.0)
+  activerecord (~> 3.0pre)
   activerecord-jdbcmysql-adapter
   delorean (~> 0.2.0)
   factory_girl (~> 1.3.3)