support show all log when setenv DEBUG to 1

make openssl as optional

fix python 3.6 support. fix alibaba#22

enhance tidevice info, complete pair function

support other app UITests

limit python version >= 3.7

force tidevice use python 3.7+

force tidevice to install py 3.7+

change script name

add tidevice wdaproxy to keep xctest running and relay