* Updated mappings to accept custom help text in YAML config
* Updated exporter to display configured help messages
* Update README to reflect aditional configurability
* Removed inaccurate comment
* Removed some cruft from a rebase
* Added `regex` match_type as valid config callout in both individual mappers
and mapper defaults
* Added test coverage for changes
* Updated documentation to reflect usage of `match_type` parameter and
provide example of a raw regex match rule
* Remove option flag
* Update NewExporter call signature to not take suffix boolean
* Update tests to reflect new behavior and signature
* Update documentation to reflect option flag removal
* Removed legacy mapper config parser
* Removed logic to switch to YAML parsing based on mapping filename
* Removed tests for legacy mapper config
* Remove references to legacy mapper config format from `README.md`