(\dosetq): Use \normalturnoffactive instead of just \turnoffactive,

(\dosetq): Use \normalturnoffactive instead of just \turnoffactive,
so \'s in node names are handled properly.
(\tie): Move definition to more rational position in the file.
(\@, \{, etc.): Use decimal numbers in all cases, to avoid use of '.
Paranoia only.
(\+): Turn off once and for all at the beginning, and define as
\tabalign in @tex.