Support FreeBSD 10

FreeBSD 10.0 has "pkgng" of the new default package manager.
`pkg_info` and such commands has been removed from this version.

I added FreeBSD10 of os type, and tests for "pkgng".
add freebsd10 to oses of Rakefile
Merge pull request #349 from serverspec/support-freebsd-10

Support FreeBSD 10
Fix specs for serverspec/specinfra#52
Bump up version and update dependency
Support installed version check for FreeBSD

see: https://github.com/serverspec/specinfra/pull/56
Merge pull request #351 from tacahilo/support-installed-version-for-freebsd

Support installed version check for FreeBSD
Invalid error when testing 'be_linked_to' on Ubuntu 13.10
bump version
Merge branch '356/head'
updated the readme to reference SpecInfra, the new file content API and general typos/grammar
the Rakefile template runs the tests as the default task
removed unnecessary return statements & assignments and improved negative condition
Merge pull request #358 from bsnape/rakefile-default-task

the Rakefile template runs the tests as the default task
Merge pull request #359 from bsnape/readme-update

updated the readme to reference SpecInfra, the new file content API and ...
Merge pull request #360 from bsnape/fix-unnecessary-return-statements

removed unnecessary return statements & assignments and improved negativ...
Added Installation from scratch of Serverspec for begineers and those who don't have the knowledge of Ruby
Updated the README.md file with latest Usages output
Merge pull request #362 from naga2raja/descriptions

Added Installation from scratch of Serverspec for begineers and those wh...