Read distribution name from info file in install time messages

Problem/Motivation

Currently, several install time messages include the distribution name, hard coded as "Open Outreach". This hard coding necessitates patching when customizing a distro based on Open Outreach; see http://chocolatelilyweb.ca/blog/customizing-open-outreach-distribution-c....

Proposed resolution

Read distribution name from info file in install time messages.

Remaining tasks

User interface changes

API changes