Added README.md

README.md

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+# LastFM To Spotify-Playlist
+This command-line-tool creates a playlist on Spotify which contains the 50 songs you listened to the most. This data is pulled from your LastFM profile.
+
+The period for which this data is pulled is limited to:
+ - One week
+ - One month
+ - Three months 
+ - Six months
+ - One year
+ - All time
+
+This limitation is set by LastFM, as those are the period selectors in their API.
+
+The tool supports setting a custom name for the playlist, setting a cover art as well as making the created playlist public (Added to profile) or collaborative. public and collaborative are mutually exclusive.
+
+---
+
+## Prerequisites
+ - A Spotify application
+ - A LastFM api token
+ - Java 18 (as this tool is not shipped with a JRE you'll need to install the JDK)
+
+## Setup
+### Spotify
+1. Visit [the Spotify Developer Dashboard](https://developer.spotify.com/dashboard/)
+2. Create an app
+3. In the "Users and Access" menu, add your Email-Address and Name
+4. In the "Edit Settings" add "http://localhost:9876/callback/spotify/" as a Redirect URI
+5. Note your Client ID and Client Secret
+
+### LastFM
+1. [Create a LastFM API account](https://www.last.fm/api/account/create)
+2. Note the API key
+
+## Usage
+In your command line run ```java -jar lfm2s-%version%.jar [arguments]```.
+
+For argument usages check [the wiki](https://github.com/B00tLoad/LastFMtoSpotifyPlaylist/wiki/Arguments)