Regen all docs. (#700)

* Stop recursing if discovery == {}

* Generate docs with 'make docs'.
diff --git a/docs/dyn/books_v1.myconfig.html b/docs/dyn/books_v1.myconfig.html
index 1d6d973..8682574 100644
--- a/docs/dyn/books_v1.myconfig.html
+++ b/docs/dyn/books_v1.myconfig.html
@@ -101,15 +101,21 @@
 
     {
     "notification": {
-      "moreFromSeries": {
+      "matchMyInterests": {
         "opted_state": "A String",
       },
       "rewardExpirations": {
         "opted_state": "A String",
       },
+      "moreFromSeries": {
+        "opted_state": "A String",
+      },
       "moreFromAuthors": {
         "opted_state": "A String",
       },
+      "priceDrop": {
+        "opted_state": "A String",
+      },
     },
     "kind": "books#usersettings", # Resource type.
     "notesExport": { # User settings in sub-objects, each for different purposes.
@@ -349,6 +355,7 @@
             "small": "A String", # Image link for small size (width of ~300 pixels). (In LITE projection)
             "thumbnail": "A String", # Image link for thumbnail size (width of ~128 pixels). (In LITE projection)
           },
+          "comicsContent": True or False, # Whether the volume has comics content.
           "authors": [ # The names of the authors and/or editors for this volume. (In LITE projection)
             "A String",
           ],
@@ -370,9 +377,9 @@
           "samplePageCount": 42, # Total number of sample pages as per publisher metadata.
           "readingModes": "", # The reading modes available for this volume.
           "printedPageCount": 42, # Total number of printed pages in generated pdf representation.
-          "averageRating": 3.14, # The mean review rating for this volume. (min = 1.0, max = 5.0)
-          "infoLink": "A String", # URL to view information about this volume on the Google Books site. (In LITE projection)
           "ratingsCount": 42, # The number of review ratings for this volume.
+          "infoLink": "A String", # URL to view information about this volume on the Google Books site. (In LITE projection)
+          "averageRating": 3.14, # The mean review rating for this volume. (min = 1.0, max = 5.0)
         },
         "recommendedInfo": { # Recommendation related information for this volume.
           "explanation": "A String", # A text explaining why this volume is recommended.
@@ -462,15 +469,21 @@
 
 {
   "notification": {
-    "moreFromSeries": {
+    "matchMyInterests": {
       "opted_state": "A String",
     },
     "rewardExpirations": {
       "opted_state": "A String",
     },
+    "moreFromSeries": {
+      "opted_state": "A String",
+    },
     "moreFromAuthors": {
       "opted_state": "A String",
     },
+    "priceDrop": {
+      "opted_state": "A String",
+    },
   },
   "kind": "books#usersettings", # Resource type.
   "notesExport": { # User settings in sub-objects, each for different purposes.
@@ -485,15 +498,21 @@
 
     {
     "notification": {
-      "moreFromSeries": {
+      "matchMyInterests": {
         "opted_state": "A String",
       },
       "rewardExpirations": {
         "opted_state": "A String",
       },
+      "moreFromSeries": {
+        "opted_state": "A String",
+      },
       "moreFromAuthors": {
         "opted_state": "A String",
       },
+      "priceDrop": {
+        "opted_state": "A String",
+      },
     },
     "kind": "books#usersettings", # Resource type.
     "notesExport": { # User settings in sub-objects, each for different purposes.