increment version to 1.7.0

Merge pull request #42 from SHMModbus/feature_send_signal

register processes for SIGUSR1 by sending SIGUSR1 to modbus-tcp-client-shm

add option to send signal to other processes on values changed

fix format

print library versions with option --longversion

Update version

Update Modbus_TCP_Client_poll.cpp

increment version

get help width from tty size

cleanup

remove duplicate 'longversion'

increment version

fix cmake action

fix flatpak