Add, delete and list rules

o PowerTrack API defined by the PowerTrack::API module
o PowerTrack API implemented by the PowerTrack::Stream class
o PowerTrack-specific exception hierarchy
o EventMachine and em-http-request used as a foundation for HTTP calls

test/test_stream_add_rules.rb

@@ -0,0 +1,22 @@
+require 'minitest_helper'
+require 'powertrack'
+require 'multi_json'
+
+class TestRule < Minitest::Test
+
+  def test_add_a_single_rule
+    stream = PowerTrack::Stream.new(
+      'laurent.farcy@ecairn.com',
+      'piodv-717',
+      'eCairn',
+      'twitter',
+      'prod')
+
+    rule = PowerTrack::Rule.new('coke')
+    p stream.list_rules
+    p stream.add_rule(rule)
+    p stream.list_rules(false)
+    p stream.delete_rules(rule)
+    p stream.list_rules
+  end
+end