(maint) Improve TravisCI testing

Adds support for parser validation as well as linting.
Merge pull request #21 from xaque208/tests

(maint) Improve TravisCI testing
Merge pull request #19 from skoef/master

Pkg 1.1.4 and up support
(rel) release 0.1.0
(maint) Add license
(rel) release 0.1.1
Update README.md

Be accurate to address #22.
Librarian Puppet install section
Merge pull request #24 from sc68cal/librarian_puppet

Librarian Puppet install section
(feat) Add feature upgradeable

This commit adds the ability to specify ensure => latest to a package
 resource, instructing pkgng to upgrade to the latest available version
 of the package.
Merge pull request #25 from xaque208/upgradeable

(feat) Add feature upgradeable
(rel) release 0.2.0
 - Only query version if enabled
Merge pull request #26 from DJClean/master

Only get version if pkgng is installed