Add view feature for Blog Post

[adnan-alam]

inc_view() method for Blog Post isn't used in https://github.com/pinax/pinax-blog/blob/master/pinax/blog/views.py. So, blog post view doesn't work.

[KatherineMichel]

@adnan-alam It looks like back in 2012 inc_views was removed from views and replaced with signals code. Perhaps the inc_views() functions are no longer needed? I wouldn't think inc_views() would have any effect on whether blog post view works. @paltman 57d2514