Document the new --top-tweets option

Author: fxcoudert

README.md

@@ -17,7 +17,6 @@ If you have Python 3 installed, you can install those modules with `pip install
 ## Setup
 
 In order to run PapersBot, you need to do the following:
-- Inside the code, ajust the [regular expression](https://en.wikipedia.org/wiki/Regular_expression) that selects the papers of interest
 - Create a file `credentials.yml` which will contain your Twitter app credentials, with four lines:
 ```
 CONSUMER_KEY: "x1F3s..."
@@ -27,9 +26,15 @@ ACCESS_SECRET: "AdnA..."
 ```
 If you do not know how to get your Twitter credentials, follow [steps #1 and #2 in this tutorial](https://www.digitalocean.com/community/tutorials/how-to-create-a-twitter-app) to register your app with Twitter and get credentials.
 - Adjust the file `feeds.txt` which contains the list of RSS feeds you want to crawl. Lines starting with `#` are ignored.
+- Inside the code, ajust the [regular expression](https://en.wikipedia.org/wiki/Regular_expression) that selects the papers of interest
+- Some extra parameters can be tweaked in configuration file `config.yml`.
 
 ## How to run
 
 PapersBot tracks in a file named `posted.dat` (which it will create) the papers that have already been tweeted. The first time you run it, if there is no `posted.dat` from a prior run, PapersBot can thus post **a lot** of papers. If you want to avoid this, especially on the first run or if it hasn't been run for a long time, use the `--do-not-tweet` option.
 
 `papersbot.py --do-not-tweet` will list the papers it _would_ tweet, without actually tweeting. But papers will still be recorded as tweeted in the `posted.dat` file.
+
+## Other features
+
+- Running `papersbot.py --top-tweets` will give you a list of the 5 top tweets, from the bot's 200 latest tweets. It sorts tweets by adding number of retweets and likes.