beremiz

- now call load, start, free PLC from the python Thread

- add a wx timer (500ms) that pull the plc state to refresh Beremiz icons
(fix problem when command PLC with the TaskBar icon)
<?xml version="1.0" encoding="UTF-8"?>
<BeremizRoot CFLAGS="-g" Linker="g++" LDFLAGS="-g">
<TargetType>
<Linux Nice="0"/>
</TargetType>
<Connection>
<Local/>
</Connection>
</BeremizRoot>