Added help notes to the predicted sequence metrics.

[oliveramds]

Still subject to change. Wanted to test git pull request.

Charge:

• "The overall electric charge of the protein"

Isoelectric Point

• "The pH at which this protein has no electrical charge"

Molecular Weight:

• "The sum of all atomic masses in the molecule"

"Mol. Ext. Coeff. @ 280 nm",

• "The strength the protein absorbs light at 280nm"

[oliveramds]

Sorry just realised that the path for aposteriori was wrong, will change that.