Make coveralls ignore spec and tmp files.

We really only care about the coverage of our lib files.

Author: myronmarston

spec/spec_helper.rb

@@ -5,6 +5,8 @@
   require 'coveralls'
   Coveralls.wear! do
     add_filter '/bundle/'
+    add_filter '/spec/'
+    add_filter '/tmp/'
   end
 end