add database gems

Gemfile

@@ -6,3 +6,5 @@ gem 'slim'
 gem 'sass'
 gem 'compass'
 gem 'kramdown'
+gem 'sequel'
+gem 'do_postgres'

Gemfile.lock

@@ -8,17 +8,23 @@ GIT
 GEM
   remote: https://rubygems.org/
   specs:
+    addressable (2.2.6)
     chunky_png (1.2.8)
     compass (0.12.2)
       chunky_png (~> 1.2)
       fssm (>= 0.2.7)
       sass (~> 3.1)
+    data_objects (0.10.6)
+      addressable (~> 2.1)
+    do_postgres (0.10.6)
+      data_objects (= 0.10.6)
     fssm (0.2.10)
     kramdown (1.1.0)
     puma (2.4.0)
       rack (>= 1.1, < 2.0)
     rack (1.5.2)
     sass (3.2.10)
+    sequel (4.1.1)
     slim (2.0.1)
       temple (~> 0.6.6)
       tilt (>= 1.3.3, < 2.1)
@@ -30,8 +36,10 @@ PLATFORMS
 
 DEPENDENCIES
   compass
+  do_postgres
   kramdown
   puma
   sass
+  sequel
   slim
   zero!