Merge pull request #172 from hurak/master

Corrected outputs of the degree() function in README.md:

Author: jverzani

README.md

@@ -82,13 +82,13 @@ To get the degree of the polynomial use the `degree` method
 
 ```
 julia> degree(p)
-1
+2
 
 julia> degree(p^2)
-2
+4
 
 julia> degree(p-p)
-0
+-1
 ```
 
 #### polyval(p::Poly, x::Number)