Add bin and edit workflow

bin/gems/facets-3.1.0/demo/core/hash/recursively.md

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+## Hash#recursively
+
+    require 'facets/hash/recursively'
+
+    h = {:a=>1, :b=>{:c=>3}}
+
+Without a block passed to the `#recursively` method, the block passed to the
+enumeratig method will be used for both recursive and non-recursive yields.
+
+    r = h.recursively.map{ |k,v| [k.to_s, v] }
+
+    r.assert == [['a', 1], ['b', [['c', 3]]]]
+
+But if we pass a block to `#recursively` we can treat the recusive yield 
+separately, which in turn allows us to manipulate the non-recursive
+yields with a different procedure.
+
+    r = h.recursively{ |k,v| [k.to_s, v] }.map{ |k,v| [k.to_s,v.to_s] }
+
+    r.assert == [['a','1'], ['b', [['c', '3']]]]
+