COLLECTION & INI Cleanup
    
    I started to cleanup the unit tests from the type cust around NULL and
    found several problems that I had to address:
    1) The choice of the "." as a search separator
    turned out to be a poor choice.
    The problem was that the file name has "."
    and INI was relaying on files to be used as
    property names.
    I corrected that part in the INI but after discussion
    with Simo we decided to switch from "." to "!"
    as special symbol anyways.
    2) Found that the property rename was not
    reinitializing the hash. Corrected.
    Added ticket to add unit tests around it (#83).