update readme

README.md

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 # Mediamur
+
 ## Disclamer
+
 The purpose of this tools is to ease the visualization of media (photo, video) in twitter in real time.
 
 Mediamur is reflecting the video activity of twitter users. It might contains unadapted contents for youth.
@@ -8,9 +10,15 @@ The tool doesn't have any control on what is send over Twitter. As **no** filter
 Please be aware and use the tool in the correct place with the adequate participants.
 
 ## Twitter API
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 You will need to create a Twitter API Application Key https://developer.twitter.com/en/apps.
 
+## Prerequisite
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+Mediamur needs Java to run.
+
 ## Quickstart
+
 * Download here
 * Unzip somewhere in your disk
 * Edit the `application.conf` 
@@ -38,26 +46,39 @@ You will need to create a Twitter API Application Key https://developer.twitter.
 
 * With a console, go to `cd $PATH_WHERE_YOU_UNZIP/mediamur-0.1/` and run `bin/mediamur` (or windows `bin\mediamur.bat`) 
 * Open a web browser to `http://localhost:48099/`
+
 ## Example
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 ### Media Flow
+
 https://youtu.be/4LMWtduAhgE
 
 Each new media is append on the top. You can click to see it.
+
 ### Media Stack
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 https://youtu.be/Qe5Kyz_bzfs
 
 Each media is getting stack per number of time it has been seen.
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 ### TV & Hashcloud
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 https://youtu.be/6phDxLYHZ9k
 
 Will play automatically each video 1 by 1 by date Mediamur receive it and make a hashtag co-occurence cloud. 
 Each hashtag can be clicked to display video under this hashtag.
 
 ## Configuration
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 ### query
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 The `track` represent the set of words that twitter will fetch as stream. It could be just words, hashtags etc...
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 ### recordActive
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 If set to `true`, the application will store all media and tweets in a directory.
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 ### sampleStream
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 If set to `true` and if the `query.track` is empty, it will use the twitter sample stream endpoint, which represent a random set 
 of tweets.