Update README

README.md

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 Adrium Easy Pass
 ================
 
+This is a fork of [PfP: Pain-free Passwords](https://pfp.works).
+It is possible to use multiple master passwords and use drag-and-drop for passwords to other applications.
+
+Differences to the original version:
+
+* Multiple master passwords can be used
+* Show the passwords concealed to use drag and drop
+* Smaller theme with accent color
+* Sync works, but disabled due to missing API keys
+
+Using multiple master passwords
+-------------------------------
+
+Sites and accounts are linked to your master password.
+If you want to use a different master password
+for different work spaces (like private and work),
+you can create a new password store by entering a different password.
+
+Select *New master password* to create a new password store.
+If you enter a master password you have used previously,
+the existing store will simply be opened.
+
+Import/Export
+-------------
+
+You can import and export data that is compatible to PfP,
+as the same format is used.
+
+The backup is limited to the currently active work space (i.e master password).
+Backups have to be created seperately for all work spaces.
+
+Description
+===========
+
 Adrium Easy Pass is a Firefox, Chrome and Opera password manager. Most passwords will be generated for a specific site and account from your master password whenever needed, these passwords are never stored on disk and can be recreated easily if data is lost. For passwords that cannot be changed for some reason, storing the password with the extension data is also supported. All extension data is safely encrypted.
 
 You can get an idea of how AEP works by using the [online version](https://adrium.github.io/easypass/). Please make sure to read the warnings when using this one!