Role with ansible 2.1 syntax

Updates to ansible 2.1
Default version for git lfs is now 1.4.4

Thanks to @daizr

Adds version variable and removes install task

Merge pull request #1 from pedrocarmona/add-version-variable

Add version variable

added install parameters

git_lfs_install_vars
--skip-smudge: allows clone repo without download images, currently best way to download files in lfs is after clone: git lfs pull.

initial release

supports debian,ubuntu and redhat, centos