CORE-569 features required for neurort

Created by: jlegeny

This pull request prepares the certivibe repository for integration in NeuroRT/OpenViBE Projects

Mainly:

• The module Socket should include the Bluetooth connection
• The module FS needs a popen function
• Replace Stimulation Multiplexer by the new implementation
• Update matrix average to avoid large memory consumption
• Add time-frequency stream type to epoch average
• Remove zombie confusion matrix box algorithm header
• Use dependencies from the bin/ folder rather than from the dependency folder
  • This also eliminates the need for the environment setting script in release
• Update the Codecs to forbid using of the old call to decode, in order to be able to avoid crashes with the new API
• Add an implementation of a specific log manager for boxes that also outputs the boxe's name and identifier
• The TGenericCodec has to be moved to a public location, i.e.: Toolkit, as it is used by Mensia plugins

CORE-569 CORE-573