Fixed error in ConvertPeptide. When output = "elements", the resulting element list did not include the additon of water. This caused the mass calculated by, for example, MonoisotopicMass(ConvertPeptide("SEQENCE")) to be incorrect.
Vingette changed to R Markdown format and complied using knitr.
Added trypsin.strict option to Digest function (thanks to S. Michalik).
Function Digest fixed. It now correctly determines peptide sequences when the number of missed cleavages is > 1 (thanks to S. Michalik).
R >= 2.14.1 required due to changes in the vignette file structure.
Function ReadMspFile added.
Function ConvertConcentration added.
Warning message in ListFormula modified to include the elemental formula (helps in tracking down the source of the warning when called multiple times within another function).
NEWS file started.