Decouple dependencies of ACIM

[Petingo]

1. Dependency of Config.h:
   Acquiring the value in config outside and passing it to the constructor might be better.
   

   augmented-carpentry/src/AIAC/ACInfoModel.h

   Line 91 in 1ba7928

   m_Scale = AIAC::Config::Get<float>(AIAC::Config::SEC_AIAC, AIAC::Config::SCALE_FACTOR, 1.0f);

2. Dependency of other layers:
   This layer stuff should not be handled in this class. The upper layer that calls this function should take care of it. Perhaps using the event system.
   

   augmented-carpentry/src/AIAC/ACInfoModel.cpp

   Line 15 in 1ba7928

   AIAC_APP.GetLayer<LayerModel>()->GetACInfoModel().GetDoc().child("acim").child("timber").child("current").last_child().set_value(m_ID.c_str());