allow no startTime in the strace file
handle ipv6 connect syscall output properly
fix parseString to consider more char as binary
Replace unprintable char to . after convert to hex
add debug option
Revise the regex pattern

Some system call would include underscore("_"), add it to pattern.
Fix issue#3

https://github.com/johnlcf/Stana/issues/3

and minor changes on the format
Merge branch 'hotfix'