housekeeping
created gleff_raa, an array of 4 bit gleff_sh
* internally uses bytearray
* stores pair of gleff_sh in each byte slot
* feek_strng() returns data compressed as a string
* iterates over actual # of gleff_sh, but feek_strng includes a trailing
zero when gleff_raa contains an odd # of gleff_sh
got node serialize/inflate code going
broke raa and fala out of node, refactored serialization
schemed on heerd management with hess_r