Compatibility hot-fix

Compatibility hot-fix to ensure installation installs the shell version 1.0.
This role is scheduled for redevelopment once DVM v2.1 is released.

Official release

• Role rename
• Role now prevents hanging with checks on php, pear, composer and unzip
• Updated readme
• Now works with galaxy

Pre-rename release

0.9

add 7.2.0 to drush_versions