updated CHANGELOG for 0.4.2 release
fixed: crash on my/page_layout (trying to modify a frozen hash)
fixed: hide mail preference not saved (my/account)
show "no data" label when there's nothing to display on project member list
show "no data" label when there's nothing to display on changelog and roadmap
updated UPGRADING doc file
updated documentation
missing parenthesis added in filter.rb (net-ldap)
file upload test now uses ActionController::TestUploadedFile