v0.1.9

Changes since the v0.1.8 release.

Build System

• improve auto change-log generator (91cb605)

Documentation

• improve development guide docs (4131985)

Maintenance (refactoring, typos, etc.)

• remove extra new line for setuptools version in Travis log (38efeaf)

Continuous Integration

• try to upgrade setuptools and see what version travis is using (70d1463)