##The Fibonacci Sequence

The fibonacci sequence are the numbers in the following integer sequence:

		0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, ...and so on

Write a function that detects whether its input is a fibonacci number or not.

Make sure the assert statements all pass. Write two of your own Python assert statements.

Resources
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[Fibonacci Numbers](http://en.wikipedia.org/wiki/Fibonacci_number)  
[Fibonacci in Nature](http://jwilson.coe.uga.edu/emat6680/parveen/fib_nature.htm)  