i added save button and reset button for birthday.
in BioCalc.js - i created a initializeControls function that creates
jQuery objects over the html elements. (similar to winforms).

i refactored BiorhythmView and BiorhythmShape to send the sender and an
argument when raising events.

in BiorhythmLegend i handled the VisibilityChanged event of a biorhythm.
i updated the version and the changelog.
i changed the reset button to reset to the birthday saved in the cookie.