Bug fixes

The following bugs have been fixed:

• Substrate alignment display: highlighting of conserved and preferred residues has been corrected for the unusual situation where the sequence of the protein with known cleavages started at position 1 in the alignment; i.e. there were no other sequences with N-terminal extentions.  Previously highlighting had been one residue out.
• Specificity heatmap: the shades of green in this display have been altered.  Previously highlighting for residues occurring in more than 40% of cleavages but less than 50% for a particular position (P4 to P4′) was too dark and indistinguishable from the black background indicating no preference.
• Peptidase distribution display: the bug that was preventing several tree tip labels from being highlighted has been fixed.