update moon phase handling

[sojeri]

consider the following partial blob returned from an API call:

{
   "moonPhase":"Waning Gibbous",
   "moonIllumination":0.9913326951713101
}

moonIllumination is very nearly full, while moonPhase is waning gibbous. should this be considered full? while the API is correct this is technically a waning gibbous-- there's a reason that some cultures consider the full moon to last for 3 days. it looks full.

some thresholds to play with:

• 95% == full

• 90%

will keep an eye on API responses the next couple days & make a judgment call on this.

another option here would be to:

• keep the phase handling as is for hinting, and to then
• divide the total illumination into slices, and
• update inline styles to adjust height/width of gibbous/crescent moon illumination according to calculations based on the slice value
  • eg, 19/20 units of illumination on a waning gibbous -> insert calculations here -> almost full moon!

[sojeri]

v1 of this is in, but it needs to be verified

https://github.com/sojeri/howsTheWeatherSeattle/commit/4873027242c8d0ac877034bdc112a6dbe315c700

[sojeri]

based on creeping on the moon tonight vs the widget, the current full moon threshold needs to be increased somewhat. it looked full but showed 3/4.