Added an Adapter interface, corrected exit_module in each adapter.

 Changes to be committed:
	new file:   nixtla/core/base_adapter.py
	modified:   nixtla/core/base_module.py
	modified:   nixtla/core/interfaces.py
	modified:   nixtla/core/pipeline.py
	modified:   nixtla/res/config.ini
	modified:   nixtla/segmentation/handspeed_based/adapters.py
	modified:   nixtla/segmentation/handspeed_based/implementation.py
	modified:   nixtla/tracking/text_based/implementation.py
	modified:   setup.py