move preflight checks to index, use current error layout

git-svn-id: http://observium.org/svn/observer/trunk@4192 61d68cd4-352d-0410-923a-c4978735b2b8
uppercasios es muy importante

git-svn-id: http://observium.org/svn/observer/trunk@4193 61d68cd4-352d-0410-923a-c4978735b2b8