ensured PEEDEE_MARKDOWN_PATHS is actually added before the default sharedir...
- ensured PEEDEE_MARKDOWN_PATHS is actually added before the default sharedir path so, you know, we can actually override the default content
- Content controller was still using Try::Tiny instead of feature 'try'
- Moved a few 'await' methods into a try block because that's where exceptions happen, not the result->* methods