Axes are now instance variables of lightcurve.
Set data and draw it in separate methods.
Don't bind scales to axes twice.
Added updateChart function.
Added toggle button for normal/phase charts.
Animate data points moving between JD/phase.
React to clicks only when the star is periodic.
Show phase chart button only for periodic stars.
Star.is_periodic should consider epoch.
Updated docstring for is_periodic to reflect epoch.
Show period and epoch independently in catalog data box.