Inconsistencies between emg_ directory names and dataset listing (bids-standard#526)

* Adding emg_Multimodal to listing and and refactoring directory names

* emg datasets in readme

Author: bclenet

README.md

@@ -89,6 +89,7 @@ emg_ConcurrentIndependentUnits	Concurrent EMG recording with multiple independen
 emg_CustomBipolar	Custom-made bipolar EMG recording setup with electrodes on flexors of the lower arm	n/a	[@neuromechanist](https://github.com/neuromechanist)	emg	channels, emg
 emg_CustomBipolarFace	EMG recording from facial muscles with many-to-many mapping between sensors and muscles	n/a	[@neuromechanist](https://github.com/neuromechanist)	emg	channels, electrodes, coordsystem, emg
 emg_IndependentMod	Commercial bipolar EMG modules recording multiple muscles with wireless sensors	n/a	[@neuromechanist](https://github.com/neuromechanist)	emg	channels, electrodes, coordsystem, emg
+emg_Multimodal	Integration of EEG, EMG, and motion capture data	n/a	[@neuromechanist](https://github.com/neuromechanist)	eeg, emg, motion	channels, electrodes, coordsystem, eeg, emg, motion, scans, events
 emg_MultiBodyParts	EMG recording from multiple body parts with different electrode types	n/a	[@neuromechanist](https://github.com/neuromechanist)	emg	channels, electrodes, coordsystem, emg
 emg_TwoHDsEMG	High-density EMG grid recordings from two body parts demonstrating grid placement documentation	n/a	[@neuromechanist](https://github.com/neuromechanist)	emg	channels, electrodes, coordsystem, emg
 emg_TwoWristbands	EMG recordings using two wristbands with dry electrodes to capture forearm muscle activity	n/a	[@neuromechanist](https://github.com/neuromechanist)	emg	channels, electrodes, coordsystem, emg