diff --git a/Dockerfile b/Dockerfile
index f656bfd..7a163e6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 FROM openjdk:8
 
-ENV JAR_VERSION 1.0.6
+ENV JAR_VERSION 1.1.0
 ENV JAR_DOWNLOAD_URL https://github.com/fabianonline/telegram_backup/releases/download/${JAR_VERSION}/telegram_backup.jar
 
 RUN apt-get update -y && apt-get install -y curl && \
diff --git a/README.md b/README.md
index fd622fc..38f61d2 100644
--- a/README.md
+++ b/README.md
@@ -18,8 +18,6 @@ You can find the whole app packed into one fat jar file under
   only.
 * Incremental backups - if you run the tool at a later time, it will only
   download new messages / media.
-* You will be able to use an HTML exporter to create static HTML files
-  containing your chats. This feature is still in the works.
 
 ## Limitations
 This tool relies on Telegram's API. They started rate limiting the calls
@@ -43,6 +41,15 @@ Basically, you have to call it with `--login` first to login to your telegram ac
 call it again with `--account <phone>` to use this account and download all
 it's history. If you have just one account, you can omit this parameter.
 
+Use `--with-supergroups` and / or `--with-channels` to also download all
+messages from the supergroups / channels you have joined that have been
+active in the last time.
+
+After making a backup, call it again with `--export html` to create a few
+more-or-less nice to look at HTML files containing all your chats. They will
+be created in the subfolder `files` of your backup. You can just open the
+file index.html in your browser to look at the files.
+
 ## Donations
 I've put quite some time into this tool. If you want to donate a small
 amount, you can send it via Bitcoin to *1CofYzS88iEngxMu4NqQeohWDBUHv9CNDJ* or via PayPal to
@@ -89,6 +96,15 @@ containing all your messages and other data. The folder `files` contains all
 media files, named after the ID of the message they belong to. Last but not
 least the folder `export` contains exported data.
 
+### What are EmptyMessages? Why are there so many messages?
+If you are a member of a normal group (non-supergroup), all messages sent to
+that group are being copied to your personal messages at Telegram's servers.
+
+If you later leave this group, those messages are being deleted at Telegram,
+but since all messages are continuously numbered, you can't simply delete
+them because that would leave a hole in your message numbers. So these
+messages are instead replaced by EmptyMessages - those things contain zero
+information, they are just saying "here was a message but it was deleted".
 
 ## Attribution
 This tool uses libraries from other developers which are covered by other licenses,
diff --git a/src/main/resources/templates/html/_stats.mustache b/src/main/resources/templates/html/_stats.mustache
index 94a43e7..d423249 100644
--- a/src/main/resources/templates/html/_stats.mustache
+++ b/src/main/resources/templates/html/_stats.mustache
@@ -164,11 +164,11 @@
 	});
 </script>
 
-<span id="heatmap"             style="width: 500px; height: 600px;"></span>
+<div id="heatmap"             style="width: 500px; height: 600px;"></div>
 
 {{#count.dialogs}}
-<span id="chart_chat_types"    style="width: 600px; height: 500px;"></span>
+<div id="chart_chat_types"    style="width: 600px; height: 500px;"></div>
 {{/count.dialogs}}
-<span id="chart_message_types" style="width: 600px; height: 500px;"></span>
-<span id="chart_media_types"   style="width: 600px; height: 500px;"></span>
-<span id="chart_authors"       style="width: 600px; height: 500px;"></span>
+<div id="chart_message_types" style="width: 600px; height: 500px;"></div>
+<div id="chart_media_types"   style="width: 600px; height: 500px;"></div>
+<div id="chart_authors"       style="width: 600px; height: 500px;"></div>