Gaining Karma by learning about about_nil.rb

* The nil object is an Object. 

[#54145807]
Gaining Karma by learning about about_nil.rb

* Exception messages better understood. If an 
  undefined method is called on nil, it will 
  raise a NoMethodError with a message stating
  that that method is not found

* most common error in Rails

[#54145807]
Gaining Karma by learning about about_nil.rb

* The nil object has some  

[#54145807]
Merge pull request #1 from lukeaiken/54145807_about_nil_master

about nil master

[Delivers #54145807]