bug release

full support for 'open with'

Image url fixes

stability release

- Cmd+Q is now correctly quitting the app (#27)

- Removed `max-width` for the preview area (#21)
- Added support for relative images (#28)
- Removed initial text (#29), which kind of resolves #14 as well
- Fixed code highlighting for code blocks that don't have code in them

stability release

even better markright

stability release