Add Subscribed field to Subreddit

How was this not already there

Signed-off-by: Vartan Benohanian <vartanbeno@gmail.com>

listings_test.go

@@ -81,6 +81,7 @@ var expectedListingSubreddits = []*Subreddit{
 		Type:         "public",
 
 		Subscribers: 8202,
+		Subscribed:  true,
 	},
 }
 

subreddit_test.go

@@ -81,6 +81,7 @@ var expectedSubreddit = &Subreddit{
 	ActiveUserCount: Int(386),
 	NSFW:            false,
 	UserIsMod:       false,
+	Subscribed:      true,
 }
 
 var expectedSubreddits = &Subreddits{
@@ -101,6 +102,7 @@ var expectedSubreddits = &Subreddits{
 			Subscribers: 15336,
 			NSFW:        false,
 			UserIsMod:   false,
+			Subscribed:  true,
 			Favorite:    false,
 		},
 		{
@@ -118,6 +120,7 @@ var expectedSubreddits = &Subreddits{
 			Subscribers: 28449174,
 			NSFW:        false,
 			UserIsMod:   false,
+			Subscribed:  true,
 			Favorite:    true,
 		},
 		{
@@ -135,6 +138,7 @@ var expectedSubreddits = &Subreddits{
 			Subscribers: 24987753,
 			NSFW:        false,
 			UserIsMod:   false,
+			Subscribed:  false,
 			Favorite:    false,
 		},
 	},

things.go

@@ -285,6 +285,7 @@ type Subreddit struct {
 	ActiveUserCount *int `json:"active_user_count,omitempty"`
 	NSFW            bool `json:"over18"`
 	UserIsMod       bool `json:"user_is_moderator"`
+	Subscribed      bool `json:"user_is_subscriber"`
 	Favorite        bool `json:"user_has_favorited"`
 }