rename bosl to phisol

lib/phisol/ast_helper.rb

@@ -0,0 +1,23 @@
+AST::Node.class_eval do
+
+  def [](name)
+    #puts self.inspect
+    children.each do |child|
+      if child.is_a?(AST::Node)
+        #puts child.type
+        if (child.type == name)
+          return child.children
+        end
+      else
+        #puts child.class
+      end
+    end
+    nil
+  end
+
+  def first_from( node_name )
+    from = self[node_name]
+    return nil unless from
+    from.first
+  end
+end