* CONDA_ADDON: added functionality to install into dedicated folder     Use instead of PREFIX: environment variable INSTALLDIR     much cleaner than before as it allows to use as dependency the      package which will be build: (e.g. make needs as depen

  * CONDA_ADDON: added functionality to install into dedicated folder
    Use instead of PREFIX: environment variable INSTALLDIR
    much cleaner than before as it allows to use as dependency the 
    package which will be build: (e.g. make needs as dependency make)
    issue #478