update eweestats.conf

added digital pins of GPIO
Update AnalogGraphThread, main, coder, readconfig, set_dir_dev

added globvar containing var for coder
setup coder in a new thread
added setup of GPIO in set_dir_dev
new element in config tuple : coders pins
readconfig reads pins of the coder
Coder support

began coder support in a new thread with GPIO interrupts
Coder management

coder reading works, ten values per second
ugly global variables for encoders_pin
Merge branch 'master' of https://github.com/gabrielhdt/EweeStats