chore(package.json): fix repo url
feat(prettypring): add support for title attribute

BREAKING CHANGE:
There is a new top-level-element: div.w11k-pretty-print. This element contains the pre element and, if present, the title. For better encapsulation all styling is now prefixed with .w11k-pretty-print.
chore(demo): rename demo to test
chore(project): bump version to 0.5.0
docs(changelog): update changelog for 0.5.0
Merge branch 'release/0.5.0' into develop