removed unused development_* environments
added roadmap view
rightbox class set to display:none for printing
Title property added for pdf export of an issue
Title property added for generated pdf gantt
Creator property added for generated pdf files
custom_field.possible_values is now serialized (no longer pipe separated)
removed translation of error messages inside ActiveRecord module
filter is now cleared when clicking on 'Issues' menu item
added a limit of 500 issues when exporting to csv or pdf
