feat(yamllint): include for this repo and apply rules throughout

* Semi-automated using `ssf-formula` (v0.5.0)
* Fix errors shown below:

```bash
chrony-formula$ $(grep "\- yamllint" .travis.yml | sed -e "s:^\s\+-\s\(.*\):\1:")
pillar.example
  1:1       warning  missing document start "---"  (document-start)
  21:3      warning  comment not indented like content  (comments-indentation)
```

chore: use `semantic-release` cross-formula standard structure

* Automated using `ssf-formula` (v0.1.0-rc.2)

chore: use `semantic-release` cross-formula standard structure

* Automated using `ssf-formula` (v0.1.0-rc.1)

ci(kitchen+travis): modify matrix to include `develop` platform

* Use balanced matrix based on `template-formula` guidelines
* Initial ref: https://github.com/saltstack-formulas/template-formula/issues/118
* Fedora still disabled due to existing errors:
  - `Job for chronyd.service failed because a timeout was exceeded.`

# [1.1.0](https://github.com/saltstack-formulas/chrony-formula/compare/v1.0.0...v1.1.0) (2019-05-10)

### Features

* fix default values ([a2a3aa7](https://github.com/saltstack-formulas/chrony-formula/commit/a2a3aa7))

# [1.0.0](https://github.com/saltstack-formulas/chrony-formula/compare/v0.2.1...v1.0.0) (2019-04-30)

### Features

* update chrony formula to new template ([8a05d0f](https://github.com/saltstack-formulas/chrony-formula/commit/8a05d0f))

### BREAKING CHANGES

* `chrony.removed` replaced by `.clean` states.

BREAKING CHANGE: `chrony.removed` replaced by `.clean` states.

## [0.2.1](https://github.com/saltstack-formulas/chrony-formula/compare/v0.2.0...v0.2.1) (2019-04-29)

### Continuous Integration

* **kitchen+travis:** implement `inspec` test matrix ([0fb718d](https://github.com/saltstack-formulas/chrony-formula/commit/0fb718d))

### Documentation

* **semantic-release:** implement an automated changelog ([d040dae](https://github.com/saltstack-formulas/chrony-formula/commit/d040dae))

### Tests

* **inspec:** get tests passing ([e5741ee](https://github.com/saltstack-formulas/chrony-formula/commit/e5741ee))

implement `inspec` test matrix & `semantic-release`

* Run `chrony.config` as workaround
  - `.config` not called by `chrony`
* Disable `fedora` for the time being due to `systemd` issue
  - Refusing to accept PID outside of service control group,
    acquired through unsafe symlink chain: /var/run/chrony/chronyd.pid

Fix rendering - regression

Add Gentoo default vars in osmap

Hide salt stdout [ERROR] if grep rc=1

Fix config state on Centos7

replace hardcoded paths with slspath variable

fix syntax error

Allows the use of gitfs mountpoint and renaming hte folder without
the need to manually update any of the paths

Simplify pillar.example

Add osmapping,defaults for modular parms

Merging as this fixes distros in Arch family.

Add chrony.removed state to uninstall package

When calling chrony.removed salt ensures the service is stopped
and the package has been removed.

Add ArchLinux support

The name from os_family was used