consitent names
centralize recyling at keyal construction
semicolons in R?
dead code, idea now implemented in plyrmr
fine tuned recycling semantics for NULLs
convertion to attribute-light lists
use already open connections
recycling is now called only in keyval() or at least should
factor out tricks to open stdin/out in binary. not reused just to keep the clutter at bay
centralize resp for connection manip under one function
add sections and more IO format def flexibility
factor out loadtb call
necessary to have connections closed and data written before move. not pretty
generalize to.dfs to multisection formats
keyval readers and writers now need to whole format

tmp file to be done
switch to symbolic constants for clarity; add NULL type code for efficiency.