new rel with ghostscript option

[cisko99za]

tip: sometime the second part of compression (this one) is useless for many pdf

so i hope on next new rel you can add from setting an option to select only ghostscript or both (ghostscript + images ECT)
this because images ECT required time for compression, and for some pdf is maybe useless
(i've test same pdf with v1.5 and 1.8.1 same quality/final size but 1/2 time less with v1.5)