0.8.0.0

Breaking changes:

• Rename "bundle" commands for consistency (#175, #147):
  • bundle → bundle-app
  • make-module→ bundle-module

Bugfixes:

• Don't fail init if a packages.dhall is already there, as it's the case of psc-package projects with local spacchetti (#180)

Other improvements:

• Remove CI check for package-sets version, add cron script to update it instead (#185)
• Fill in CHANGELOG from release notes (#186)
• Fix LICENSE file so GitHub recognizes it (#197)
• Add a CONTRIBUTING file (#198, #189)
• Improve README (#199, #194, #196, #201, #193, #192, #187, #178, #191, #150, #142)