New installer/issues

This is a list of known issues in the new-installer branch. List started from Tim's list at.


 * Evaluate restart possibilities for failed install step
 * Test canCreateAccounts
 * Get someone to fix the error box styling
 * Fix session expiry message "$1"
 * Object cache settings (r55147)
 * proprietary DB support, https://bugzilla.wikimedia.org/show_bug.cgi?id=15493
 * Review initial main page text
 * Make sure usernames are trim'd
 * Logo URL doesn't default to actual path
 * README/RELEASE-NOTES/COPYING all need to be properly wiki formatted, else we need to include wiki-formatted version
 * Memecached settings