fillcontinents and aeqd projection

The `fillcontinents` routine seems to fill the ouside of the continents, not the inside under some specific lat/lon values. (`basemap.__version__ = 1.1.0` from `conda-forge`)

```
import matplotlib.pyplot as plt
from mpl_toolkits.basemap import Basemap

clon, clat = 62.426312397000004, -34.6302096207
bmap = Basemap(projection='aeqd', lat_0=clat, lon_0=clon)

fig, ax = plt.subplots()

conts = bmap.fillcontinents(zorder=9)
conts = bmap.drawcoastlines(color='black', zorder=10)

plt.show()
```


Start by running the provided Python example with the aeqd projection and inspect the fillcontinents and drawcoastlines entry points. Compare the filled regions with the coastline for the supplied latitude and longitude values; the issue is done when continents are filled on the correct side and a regression check covers this case.

Written by the indexing model from the issue text.