Fix download over SSL bug

The security policy on the episode download manager was not being set. The default policy is now used.

Signed-off-by: Tom Diggle <tom@tomdiggle.com>
Change AFNetworkActivityIndicatorManager now gets enabled in application:willFinishLaunchingWithOptions:

Signed-off-by: Tom Diggle <tom@tomdiggle.com>
Minor code refactor

Easier to read this way

Signed-off-by: Tom Diggle <tom@tomdiggle.com>
Change IGEpisodeCell now observes AFNetworkingTaskDidStartNotification and updates the cell to display download progress instead of reloading the table view

Signed-off-by: Tom Diggle <tom@tomdiggle.com>