Updated INSTALL file to point to upgradeto15 wiki page.
git-svn-id: https://mifos.svn.sourceforge.net/svnroot/mifos/branches/v1.5.x@... a8845c50-7012-0410-95d3-8e1449b9b1e4
Authored by: vanmh 2010-04-28
Parent: [28ae54]
Child: [a3a50d]