added privacy

Privacy.md

@@ -0,0 +1,13 @@
+# Permissions Explanation
+
+1. downloads - Generated epub needs download permission to be downloaded.
+2. storage - Parser definitions are stored in local storage so modifications can be done.
+3. scripting - Parser definitions are stored as javascript code for maximum flexibility, 
+this allows eval of the definition upon start up.
+4. <all_urls> - For background fetching of chapters.
+5. clipboardRead (optional) - For setting cover image from clipboard.
+6. unlimitedStorage (optional) - If you want to cache current parsed text, 
+this is necessary to overcome storage limits.
+7. declarativeNetRequestWithHostAccess, declarativeNetRequestFeedback (optional) - Some websites do not
+allow fetching of resources without a "referer" header, this injects a referer for requests
+coming from the extension.