update bundle and switch to Ruby 2

Gemfile

@@ -1,6 +1,6 @@
 source :rubygems
 
-ruby '1.9.3'
+ruby '2.0.0'
 
 gem 'sinatra'
 gem 'data_mapper'

Gemfile.lock

@@ -1,13 +1,13 @@
 GEM
   remote: http://rubygems.org/
   specs:
-    addressable (2.2.8)
+    addressable (2.3.4)
     bcrypt-ruby (3.0.1)
     coffee-script (2.2.0)
       coffee-script-source
       execjs
-    coffee-script-source (1.3.3)
-    daemons (1.1.8)
+    coffee-script-source (1.6.2)
+    daemons (1.1.9)
     data_mapper (1.2.0)
       dm-aggregates (~> 1.2.0)
       dm-constraints (~> 1.2.0)
@@ -18,14 +18,14 @@ GEM
       dm-transactions (~> 1.2.0)
       dm-types (~> 1.2.0)
       dm-validations (~> 1.2.0)
-    data_objects (0.10.8)
+    data_objects (0.10.13)
       addressable (~> 2.1)
     dm-aggregates (1.2.0)
       dm-core (~> 1.2.0)
     dm-constraints (1.2.0)
       dm-core (~> 1.2.0)
-    dm-core (1.2.0)
-      addressable (~> 2.2.6)
+    dm-core (1.2.1)
+      addressable (~> 2.3)
     dm-do-adapter (1.2.0)
       data_objects (~> 0.10.6)
       dm-core (~> 1.2.0)
@@ -57,41 +57,43 @@ GEM
       uuidtools (~> 2.1)
     dm-validations (1.2.0)
       dm-core (~> 1.2.0)
-    do_mysql (0.10.8)
-      data_objects (= 0.10.8)
-    do_postgres (0.10.8)
-      data_objects (= 0.10.8)
-    eventmachine (0.12.10)
+    do_mysql (0.10.13)
+      data_objects (= 0.10.13)
+    do_postgres (0.10.13)
+      data_objects (= 0.10.13)
+    eventmachine (1.0.3)
     execjs (1.4.0)
       multi_json (~> 1.0)
     fastercsv (1.5.5)
-    json (1.7.4)
-    json_pure (1.7.4)
-    multi_json (1.3.6)
+    json (1.8.0)
+    json_pure (1.8.0)
+    mini_portile (0.5.0)
+    multi_json (1.7.6)
     mysql2 (0.3.11)
-    nokogiri (1.5.5)
-    pg (0.14.0)
-    rack (1.4.1)
-    rack-protection (1.2.0)
+    nokogiri (1.6.0)
+      mini_portile (~> 0.5.0)
+    pg (0.15.1)
+    rack (1.5.2)
+    rack-protection (1.5.0)
       rack
-    rack-rewrite (1.2.1)
-    rdiscount (1.6.8)
-    sass (3.1.20)
-    sinatra (1.3.2)
-      rack (~> 1.3, >= 1.3.6)
-      rack-protection (~> 1.2)
+    rack-rewrite (1.3.3)
+    rdiscount (2.1.6)
+    sass (3.2.9)
+    sinatra (1.4.3)
+      rack (~> 1.4)
+      rack-protection (~> 1.4)
+      tilt (~> 1.3, >= 1.3.4)
+    slim (2.0.0)
+      temple (~> 0.6.5)
       tilt (~> 1.3, >= 1.3.3)
-    slim (1.2.2)
-      temple (~> 0.4.0)
-      tilt (~> 1.3.3)
-    stringex (1.4.0)
-    temple (0.4.0)
-    thin (1.4.1)
+    stringex (1.5.1)
+    temple (0.6.5)
+    thin (1.5.1)
       daemons (>= 1.0.9)
       eventmachine (>= 0.12.6)
       rack (>= 1.0.0)
-    tilt (1.3.3)
-    uuidtools (2.1.3)
+    tilt (1.4.1)
+    uuidtools (2.1.4)
 
 PLATFORMS
   ruby