* frontmatter functions now exported as curried constructors
* changed formats.js to accomodate frontmatter.js changes
* can only use custom delimiters if format is specified
* reverting changes
* updated tests to reflect changes
* created tests for custom delimiters
* updated docs to reflect addition of custom delimiter configuration
* formatByExtension no longer takes custom delimiter
* missed some formatByExtension calls
* Edited the docs according to suggestions
* Throws an error if a custom delimiter is set without declaring frontmatter format
* Throws error if custom delimiter set without explicit and proper frontmatter format being declared
* example config file set to proper defaults
* moved frontmatterFormats to formats
* Update .all-contributorsrc
* updated contributions
* Clarify docs
* Format JSON files.
Currently we store JSON as a single line in files. We should prettify it
like we do the other formats.
* Add output parsers to the frontmatter list.
* Cleanup frontmatter format parser options.
* Support writing frontmatter in TOML and JSON.
Right now we can read TOML or JSON frontmatter by inferring,
but we can only write frontmatter in YAML. This change allows the
frontmatter format to be explicitly set for reading and writing.
* Fix frontmatter formatter.
* Update Frontmatter formatter tests.
* Update frontmatter format docs.
* Clean up frontmatter formatter.
* Move `formatToExtension`.
* Use plain objects for file formatters.
* Use same parsers for files and frontmatter.
We want to use our file parsers for frontmatter, instead of the builtin
ones, as they process some formats (images, dates) properly.
* Cleanup YAML frontmatter parser code.
