Splitted resonance library into two separate elements:

Splitted resonance library into two separate elements:
1) PWG2resonances:
   this contains the basic package, with all necessary to set up a resonance analysis
   in the old way, using all the objects developed since the introduction of this package
   and without any dependence on non-analysis libraries
2) PWG2rsnextra:
   all the classes/code/analysisTasks which do not use the basic RSN package
   this library can have dependences on non-analysis code (currently, it depends on TOFrec)
   but it has to be viewed as a temporary entry due to current situation of the available reconstruction
   or to keep track of analysis tasks related to resonances, but not yet fuly integrated in the standard package