Merging some changes made up on gitub.com

Merge branch 'master' into develop

CONTRIBUTING.md

@@ -0,0 +1,4 @@
+
+# How to contribute
+
+Our contributing policy will be documented here. 

LICENSE.md

@@ -0,0 +1,19 @@
+The MIT License (MIT)
+
+Copyright <year> AT&T Intellectual Property. All other rights reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software
+and associated documentation files (the "Software"), to deal in the Software without
+restriction, including without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or
+substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

@@ -17,8 +17,8 @@ An example of using this library to accomplish this specific application is cont
 ~~~~
 from belief_network_lib import network
 
-nodeA = network.Node([0,1], id="A")
-nodeB = network.Node([0,1], id="B")
+nodeA = network.Node(id="A")
+nodeB = network.Node(id="B")
 
 nodeA.cpt = {None: [0.4, 0.6]}   #Node A has no parents, thus the key in the conditional probability table is None
 
@@ -30,7 +30,7 @@ nodeA.add_child(nodeB)
 nodeB.add_parent(nodeA)
 
 nodes = [nodeA, nodeB]
-aBN = network.BeliefNetwork(nodes)
+aBN = network.BeliefNetwork(nodes)              #Nodes must be in topologically sorted order.
 
 samples = [aBN.sample() for x in range(1000)]
 ~~~~