Arduino IDE library packaging modification

#579
Update doc to reflect necessary manual changes
Implement a part of these changes to automatic script

scripts/prepare_deploy.sh

@@ -3,6 +3,8 @@ rename -v 's:/:-:g' .pio/build/*/*.bin
 mkdir toDeploy
 rename 's/.pio-build-//' .*.bin
 cd .pio/libdeps
+echo "replace space by _ in folder names"
+find . -type d -name "* *" | while read FNAME; do mv "$FNAME" "${FNAME// /_}"; done
 echo "zipping libraries per board"
 for i in */; do zip -r "${i%/}-libraries.zip" "$i"; done
 ls -la