added neo4j sample app

apps/neo4j_app/Gemfile

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+source "http://rubygems.org"
+gem 'neography' 
+gem 'sinatra'

apps/neo4j_app/Gemfile.lock

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+GEM
+  remote: http://rubygems.org/
+  specs:
+    crack (0.1.8)
+    httparty (0.7.7)
+      crack (= 0.1.8)
+    json (1.5.1)
+    neography (0.0.13)
+      httparty (~> 0.7.3)
+      json
+    rack (1.2.2)
+    sinatra (1.2.6)
+      rack (~> 1.1)
+      tilt (>= 1.2.2, < 2.0)
+    tilt (1.3)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  neography
+  sinatra

apps/neo4j_app/neo4j.rb

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+require 'rubygems'
+require 'sinatra'
+require 'neography'
+
+include Neography
+
+before do
+  if ENV['VCAP_SERVICES']
+    services = ENV['VCAP_SERVICES']
+    neo4j = services['neo4j-1.4'][0]['credentials']
+  else
+    neo4j = {}
+  end
+
+  Neography::Config.server = neo4j['hostname'] || 'localhost'
+  Neography::Config.port =  (ENV['port'] || "7474").to_i
+  Neography::Config.authentication = 'basic'
+  Neography::Config.username = ENV['username']||"test"
+  Neography::Config.password = ENV['password']||"test"
+
+  @neo = Rest.new
+  puts @neo.configuration
+  @root = Node.load(0)
+end
+
+get '/' do
+  node = Node.create("answer" => 42, "question" => "All") 
+  @root.outgoing(:ANSWER) << node
+
+  "<h1>Answers from Neo4j!</h1>" +
+  "<dl>" +
+  @root.outgoing(:ANSWER).collect { |n| "<dt>Question: #{n.question}</dt><dd>Answer: #{n.answer}</dd>"}.join +
+  "</dl>"
+end