changed action 'view' to 'show'

On the month jumper i encountered a problem when changing the date, the url would lead to a non existing page.
In Calender.php i saw that 'show' was a allowed action so i presumed changing 'view' to 'show' would fix the issue.
Merge pull request #55 from TheBnl/patch-1

changed action 'view' to 'show'