Add simple web interface

Gemfile.lock

@@ -36,9 +36,14 @@ GEM
     diff-lcs (1.2.5)
     globalid (0.3.3)
       activesupport (>= 4.1.0)
+    haml (4.0.6)
+      tilt
     i18n (0.7.0)
     json (1.8.2)
     minitest (5.5.1)
+    rack (1.6.0)
+    rack-protection (1.5.3)
+      rack
     rake (10.4.2)
     rspec (3.2.0)
       rspec-core (~> 3.2.0)
@@ -53,9 +58,14 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.2.0)
     rspec-support (3.2.2)
+    sinatra (1.4.5)
+      rack (~> 1.4)
+      rack-protection (~> 1.4)
+      tilt (~> 1.3, >= 1.3.4)
     slop (3.6.0)
     sqlite3 (1.3.10)
     thread_safe (0.3.4)
+    tilt (1.4.1)
     timecop (0.7.3)
     tzinfo (1.2.2)
       thread_safe (~> 0.1)
@@ -67,7 +77,9 @@ DEPENDENCIES
   bundler (>= 1.0.0)
   byebug
   crono!
+  haml
   rake (~> 10.0)
   rspec (~> 3.0)
+  sinatra
   sqlite3
   timecop (~> 0.7)