Removing assemblies processing from IS.pm

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extra : source : 6eafc107f8a0503d5606a30d1ea116d340519f7e
fixing closed handling for 0 amount invoices on search

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extra : source : b12a3660e9dfef02299a33d0e36aef65604898e5
Merge pull request #293 from einhverfr/master

assembly fixes