Don't catch Exception when parsing YAML frontmatter
Fixes the Travis CI status image
Merge pull request #760 from k33l0r/patch-1

Fixes the Travis CI status image
Added before_render & after_render hook
Can be used for pre-processing content
Update README.md
Merge pull request #761 from LeonB/3.0-stable

Added before_render & after_render hook
Merge branch '3.0-stable'

Conflicts:
	README.md