renaming jcom.* to j.*

of course it doesn't work for now : some (autonomous) externals do work, but all the NodeLib stuff is basically broken...
Renaming some external folders which weren't
Renaming jcom.preset.maxhelp into j.preset.maxhelp
Updating all parameter test patchers to not print their self into the Max windows
Updating all test patchers to not print their self into the Max windows
merging recent changes
Renaming jcom. into j.