Add bin and edit workflow

bin/gems/facets-3.1.0/demo/core/class/descendants.md

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+## Class#descendants
+
+    require 'facets/class/descendants'
+
+The `Class#descendants` method returns a list of classes that are subclasses
+of a class.
+
+    a = Class.new
+    b = Class.new(a)
+    c = Class.new(b)
+
+    a.descendants.assert == [b,c]
+

bin/gems/facets-3.1.0/demo/core/class/to_proc.md

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+## Class#to_proc
+
+    require 'facets/class/to_proc'
+
+The `Class#to_proc` method provides a convenient way to create new
+instances from a set of initialization data.
+
+    person = Struct.new(:name)
+    people = ["joe"].map(&person)
+    people[0].name.assert == "joe"
+