elektronaut/vector2d — pull request #3 by bwl21 (2014-08-30 11:45:51+00:00)
Title: Support rotation of a vector

Hi, I need to rotate a vector by a given angle.
When I wrote the tests, I needed round to be like Float.round as of Ruby 1.9

Now support round as in ruby 1.9.3 -> round(digits = 0)