csl.rb in csl-1.0.0.pre3

- old
+ new

@@ -2,9 +2,10 @@
 require 'enumerator'
 require 'forwardable'
 require 'open-uri'
 require 'singleton'
 require 'set'
+require 'time'
 
 require 'csl/version'
 
 require 'csl/compatibility'
 require 'csl/extensions'
\ No newline at end of file