SPXD-7 | release v0.2.0: update content for develop branch
SPXD-10 | tag deployment of vX.X.X to docs/X.X.X; improve .travis.yml
Merge remote-tracking branch 'hoatle/improvements/10_tag_deployment' into develop
SPXD-9 | PasS deployment: heroku
SPXD-9 | PaaS deployment on heroku: add default .gitignore
Merge remote-tracking branch 'hoatle/features/9_heroku_deployment' into develop
SPXD-11 | release v0.3.0: update release content
SPXD-11 | release v0.3.0: update README
Merge remote-tracking branch 'hoatle/tasks/11_release_v0.3.0' into releases/0.3.0
SPXD-11 | release v0.3.0: fix the wrong markdown link syntaxt
Merge remote-tracking branch 'hoatle/tasks/11_release_v0.3.0' into releases/0.3.0
SPXD-11 | release v0.3.0: add Migration section to CHANGELOG, remove .DS_Store, update 404.html
Merge remote-tracking branch 'hoatle/tasks/11_release_v0.3.0' into releases/0.3.0
Merge tag 'v0.3.0'

v0.3.0 Release

Conflicts:
	README.md
	scripts/spxd.sh