Merge pull request #787 from collimarco/patch-1

Clarify in README that tasks are run in parallel

Author: benlangfeld

README.md

@@ -49,6 +49,7 @@ Run `whenever --help` for a complete list of options for selecting the schedule
 
 ```ruby
 every 3.hours do # 1.minute 1.day 1.week 1.month 1.year is also supported
+  # the following tasks are run in parallel (not in sequence)
   runner "MyModel.some_process"
   rake "my:rake:task"
   command "/usr/bin/my_great_command"