beremiz

Fix wrong ST code generation in case of several coils connected to each other.


For example,
|---|Var0|----(Var1)--(Var2)---|

Closes #32
<?xml version='1.0' encoding='utf-8'?>
<BaseParams xmlns:xsd="http://www.w3.org/2001/XMLSchema" IEC_Channel="2" Name="py_ext_0"/>