fix bugs of fall_down
change condition of fall-down
some fix and add debug-print to affection helper
transform to one-line in fall-down
fix bug of if-statement
fix bug of growth-print
split script in love or not
fix bug of slave-description
add limit, to  avoid from affection explosion
decrease performance of voltage in train
fix bug of slave-initialize
fix bug of increase slave base_strength
consider slave affection, about voltage and obedience
remove debug-print
guarantee minimum obedience
rename violence command