update to most recient working WifiManager

added syslg & cleanup SSID/Device name

Backlink to CADLAB.io has been added.

hold button for 1 second for config mode, 10 more seconds for factory reset

a few minor changes to show version in Config portal

Drop platformio and use submodules to load hardware and libraries from git (#13) * added submodules so we controle the versions * remove platformio

change log prefix to seconds since boot + chip ID

dont need the hack anymore because we have a modified framework

use a modified fork of the arduino platformio framework to get updated ATTiny support

Build with platformio (#12) Include platformio builds as part of CI. This is a first step to adding release generation from travis builds.