Added internal redirect

(Is there a way to get content_type that wouldn't require File::MMagic?)
Apache2::SubRequest's method lookup_file coused segfault in apache, so I scrapped that and used File::MMagic to to content type determing
Also fixed credit and added a currentPage.rankIsN variable to navigation

docs/changelog/6.x.x.txt

@@ -48,9 +48,10 @@
  - Added a User form field type.
  - Added a symbol next to items in the asset manager to indicate if they have
    children or not.
- - Added more templating options to the Paginator thanks to Jukka Raimovaara.
- - Added the currentPage.rank variable to the nav template thanks to Jukka
-   Raimovaara.
+ - Added more templating options to the Paginator. (thanks to Jukka Raimovaara
+   / Axxion Oy)
+ - Added the currentPage.rank and currentPage.rankIsN variable to the nav
+   template. (thanks to Jukka Raimovaara / Axxion Oy)
  - Added a screenshot feature to the matrix.
  - Added an option to delete Matrix fields.
  - Added an API for retrieving email from POP3 servers.

docs/credits.txt

@@ -36,7 +36,7 @@ Contributing Developers..............Peter Beardsley / Appropriate Solutions
                                      Tony Mountifield
                                      Tavis Parker / ParkerOne Consulting
                                      Daniel Quinlan
-                                     Jukka Raimovaara
+                                     Jukka Raimovaara / Axxion Oy
                                      Alan Ritari / DonorWare
                                      Hal Roberts / Harvard
                                      Steve Simms