Add Google Analytics tracking id

Author: gitcheng

_posts/2015-01-24-golden-ratio-and-fibonacci-numbers.md

@@ -5,6 +5,18 @@ category: math
 tags: golden_ratio, Fibonacci, series
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 Pretty much everybody heard about the golden ratio, and if you are a little
 math-inclined or still remember something from school, you may have heard 
 the Fibonacci numbers too. That is, 0, 1, 1, 2, 3, 5, 8, 13, 21, etc, where
@@ -124,5 +136,3 @@ adjacent Fibonacci numbers (can be very close to the golden ratio but not
 exactly), you will end up with [a square (or two)](http://www.mathsisfun.com/numbers/images/fibonacci-spiral.gif),
 that is, the ratio of the sides is $$a_2/a_1$$.
 
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@@ -1,6 +1,17 @@
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