chg: consistent views directory @refactor
[#1] chg: add filters for Liquid.
[#1] chg: add tests for Liquid filters.
[#1] new: Add filter support for Liquid.

Closes #1.
chg: Add gitchangelog configuration file.
chg: Use markdown for gitchangelog output.
chg: Allow issue numbers in gitchangelog messages.
chg: Switch from stakk to sidewinderlabs.
Bump version number.
Update changelog.
Merge branch 'release/0.9.0' into develop