Release v0.1.0 of the decred library

Release v0.1.0 (#189)

* btc: add btc network configuration parameters (#184)

* add btc network configuration parameters

* gitignore: Add cpython generated files. (#182)

* gitignore: Add cpython generated files.

* Generalize ignores.

* Update decred version to v0.1.0

Co-authored-by: buck54321 <buck54321@gmail.com>
Co-authored-by: JoeGruffins <34998433+JoeGruffins@users.noreply.github.com>