- Cosmetic: replace tabs with blanks, strip trailing white space,
and update copyright headers with spec-cleaner.

- Update yaml to version 0.9.0.
# ChangeLog for yaml
## 0.9.0
* Expose style and tags on mappings and sequences in Text.Libyaml [#141](https://github.com/snoyberg/yaml/pull/141)
## 0.8.32
* Escape keys as necessary [#137](https://github.com/snoyberg/yaml/issues/137)
* Support hexadecimal and octal number values [#135](https://github.com/snoyberg/yaml/issues/135)
* More resilient `isNumeric` (should reduce cases of unneeded quoting)
* hpackify
* src subdir

- Update yaml to version 0.8.31.1.
## 0.8.31.1
* Add a workaround for a cabal bug [haskell-infra/hackage-trustees#165](https://github.com/haskell-infra/hackage-trustees/issues/165)
## 0.8.31
* Add `decodeThrow` and `decodeFileThrow` convenience functions.
* Upgrade libyaml versions
* Deprecate `decode` and `decodeEither`

* Tweaks to the executable `yaml2json` [#119](https://github.com/snoyberg/yaml/pull/119):
to the one from Data.Yaml.Include that supports !include syntax.
* Add env variable parsing. loadYamlSettings can read config values from the
- change libyaml deps from pkgconfig to direct libyaml-devel for SLE12 support
- build against system libyaml
- add %defattr(-,root,root,-) to devel files
- Initial build version 0.8.5