Release 0.7

New stuff:

1. Map
   1.1. Choice for tiles.
   1.2. Pass Glottocodes.
   1.3. Save map as PNG
   1.4. Normal labels for minicharts.
   1.5. Unhardcoded default color if features are not given.
2. Other
   2.1. Support for non-aggregated data from Phoible.
   2.2. Get coordinates by Glottocode.