mark some internal words private

maybe underscore is not the best convention for privatizing words...
fix testloop

problem: simple ruby interpreter doesnt explicitely check for escaped
situations regarding exclamation marks, which denote comments
rename dup -> _dup and pwrite -> _pwrite internally

because implementing reset with execve pulls in unistd.h which also
defines both
increase dict size for devel
implement reset for linux
make mfactor only terminate on C-c
forgot include for reset
add comments to the word set, fix ruby reader to accept \! escaping
monkey patch
try to fix noprivate build switch
privatizing underscore words in stdlib.mfactor
new word: dsize, returns reserved and used dict memory