[dev] gollem cleanup patch

[Marko]

a couple of things:
1) my gollem was failing because directories like
    op/bando comune/bozze
where being searched for as
    op%2Fbando+comune%2Fbozze
and never coming up, then navigation was failing with up-dir etc... so i've
added a urldecode() to the $dir before it is set into $_SESSION

2) move links to addParameter() syntax instead of the hardcoded ? =

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