Add new task for printing a param to readme

This is undocumented, but is very useful. So we should document it.

Signed-off-by: Moses Mendoza <moses@puppetlabs.com>
Merge pull request #266 from MosesMendoza/maint/master/add_new_task_to_readme

Add new task for printing a param to readme
Add a travis-ci status to the README.md

This way we can tell on viewing if the build is passing.

Signed-off-by: Moses Mendoza <moses@puppetlabs.com>
Merge pull request #267 from MosesMendoza/maint/master/add_status

Add a travis-ci status to the README.md
Remove ruby 2.1.0 from travis file because it's not supported yet
(maint) Add untar_into method

This commit adds a simple method that shells out to tar to unpack a tarball
into a target directory. Basic sanity checks are present, but this assumes a
tar that can gunzip and untar at once.
(maint) Add fetch_uri method to Pkg::Util::Net

This commit adds a simple utility method to fetch and download a uri to a
location on disk. It is pure ruby and as such is more portable than curl or
wget.