- Orca configuration : update table reading to read table inside document by cells, not by lines

- upgrade orca configuration for adding orca-tab to read current element, orca+F10 to read notications
- update documentation in consequence

add Orca+b in the list, remove super+p because its not activate by default and replace wrong keyboard shortcut for the help

migration orca configuration to be compatible with 3.20 version and change time format to be compliant with mbrola

Conflicts:
	usr/bin/ocrize