prepare for geo-types 0.7.15 release

prepare for bugfix release

add changelog entries

prepare for geo-types 0.7.14 release

prepare for geo 0.29.2 release

prepare for 0.29.1 release again

prepare for v0.29.0 release

Merge pull request #1236 from georust/frewsxcv-EB5D0FCB-3F16-47E9-99F…

…2-38E366BCA8DB

Fix bug where `geo_traits::TriangleTrait::{second,third}` return the first coordinate.

Merge pull request #1157 from kylebarron/kyle/geo-traits-crate

Add geo-traits crate

Merge pull request #1156 from georust/frewsxcv-patch-3

Prepare for geo-types 0.7.13 release