minor change
that allows to override the directories where the includes exist for
the esp32-camera component. It should function the same as before, if you do not provide an override.

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Signed-off-by: John Gentilin <gentijo@gmail.com>

Adds `acamera `instance supporting async capture method 
Use [mp_jpeg](https://github.com/cnadler86/mp_jpeg) instead of convert
methods.

Fix #25
Fix #26

…om esp registry

Add new function to register usermodule only once