Added basic docs for some of ripmes options

docs/options.md

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+file.overwrite     | bool | If true ripme will overwrite existing files rather than skip them
+
+clipboard.autorip  | bool | If true ripme will try to download any links in the clip board
+
+error.skip404      | bool | Don't retry on 404 errors
+
+download.save_order| bool | If true ripme will prefix each downloaded file with a number in the order the file was download
+
+auto.update        | bool | If true ripme will auto-update every time it's started
+
+play.sound         | bool | If true ripme will play a sound every time a rip finishes
+
+download.show_popup| bool | TODO figure out what this is for
+
+log.save           | bool | If true ripme will save it's logs
+
+urls_only.save     | bool | If true ripme will save all urls to a text file and download no files
+
+album_titles.save  | bool | Currently does nothing
+
+prefer.mp4         | bool | Prefer mp4 when downloading a video that has more than 1 format
+
+download.timeout   | int  | File download timeout (in milliseconds)
+
+page.timeout       | int  | Page download timeout (in milliseconds)
+
+download.max_size  | int  | Maximum size of downloaded files in bytes
+
+threads.size       | int  | The number of threads to use
+
+twitter.auth       | String | Twitter API key (Base64'd)
+
+tumblr.auth        | String | Tumblr API key
+
+log.level          | String | The debug log level (Example: Log level: Debug)
+
+gw.api             | String | TODO figure out what this is for
+
+twitter.max_requests | int | TODO figure out what this is for
+