Decryptor's release notes
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[Decryptor 1.0]

- peptide-spectrum-match (PSM) evaluation
  - basis: peptides which pass X!Tandem's maximal E-Value <= 0.1
  - if there are multiple candidate peptide interpretations for same spectrum,
    the spectrum is discarded from results
    - while this preserves specificity, it decreases sensitivity considerably and
      will be soon important point of development
  - tags are attached to each PSM, and their agreement with X!Tandem interpretation 
    of spectrum is evaluated
    - PepNovo is used with CID_ID_TRYP model

- precursor and fragment mass tolerance units
  - PepNovo does not support ppm's, the values are converted to Da at 5 kDa

- protein inference
  - simple greedy set covering approach to the problem
  - no grouping to indiscernible protein groups