Merge pull request #459 from tphoney/modules-1675_check_gpg_version

initial commit for apt_key checking

diff --combined README.md
index 7e39c8d9eeb328ca8dff84da171c47428ce464f1,45e905248f90e52fc052b4dcd7d25dc11ff0d45f..b325ba9d2bbbe0d7c861ff80618237e828506f10
--- 1/README.md
--- 2/README.md
+++ b/README.md
@@@ -8,7 -8,7 +8,7 @@@ The apt module provides a simple interf
  
  The apt module automates obtaining and installing software packages on \*nix systems.
  
- **Note**: While this module allows the use of short keys, **we urge you NOT to use short keys**, as they pose a serious security issue by opening you up to collision attacks.
+ **Note**: While this module allows the use of short keys, **warnings are thrown if a full fingerprint is not used**, as they pose a serious security issue by opening you up to collision attacks.
  
  ## Setup
  
@@@ -332,14 -332,6 +332,14 @@@ apt::sources
  
  It is recommended to read the manpage 'apt_preferences(5)'
  
 +####apt::ppa
 +
 +* `ensure`: Whether we are adding or removing the PPA. Can be 'present' or 'absent'. Defaults to 'present'.
 +* `release`: The codename for the operating system you're running. Defaults to `$lsbdistcodename`. Required if lsb-release is not installed.
 +* `options`: Options to be passed to the `apt-add-repository` command. OS-dependent defaults are set in `apt::params`.
 +* `package_name`: The package that provides the `apt-add-repository` command. OS-dependent defaults are set in `apt::params`.
 +* `package_manage`: Whether or not to manage the package providing `apt-add-repository`. Defaults to true.
 +
  ### Testing
  
  The apt module is mostly a collection of defined resource types, which provide reusable logic for managing Apt. It provides smoke tests for testing functionality on a target system, as well as spec tests for checking a compiled catalog against an expected set of resources.