update install instructions
dump stdin if no arguments provided
don't use printf, it buffers
fix ascii indentation when stopped exactly in the middle of the line
don't need select at all, just write as much as we got
it's ascii, not asci, ffs
print whatever was read as soon as possible
add a note on stdin
print filename if several passed as arguments
fix ascii alignment when there is less bytes at the last line
don't memset on NULL if malloc failed