Abstract Installer for Agasti to be Version Agnostic for Sahana Agasti

The Sahana Agasti Mayon Installer is well advanced in it's implementation, level of abstraction, loose decoupling from the framework(symfony 1.4) and the cases it checks for. It is comforting to the user to have an installation that is straightforward, Sahana Agasti Mayon's installer provides this. When switching be...