Add instructions to get help.

Author: samuelmcdermott

README.md

@@ -88,7 +88,7 @@ The `MicroscopeClient` object has a few basic methods.  If you created an instan
 |`microscope.record_video(format, framerate, length, save_locally, save_location)`| `format`: video format (`h264` and `mjpeg` tested) (default: h264)<br/>`framerate`: video framerate (fps) (default: 30)<br/>`length`: length of video (seconds) (default: 1)<br/>`save_locally`: Logical on whether to save video locally (default: true) <br/>`save_location`: The directory in which to save the video (filename is the timestamped one generated by the microscope) (default: current working directory) | The location (either locally or on the microscope) where the video has been saved| Records a video using the [video extension](https://gitlab.com/openflexure/microscope-extensions/openflexure-videoplugin).|
 |`microscope.preview()` | | |Launches a preview window displaying a live video feed from the microscope.|
 
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+For more information, run `help OFMClient`.
 ## Extensions
 
 To run methods provided by the microscope extensions, you can use the `extensions` `struct` to make `get` or `post` requests.