removes i18n for planning element

covered by work_packages
adds route for work_package#update

The general work_package scoped under project is no longer necessary
adds a "following priorities" step definition
adds permission for work_package#udpate
adds params for update work_package to permitted params
adds a method for updating a work_package

This ignores update_attributes conciously as the goal is to move it into a business object that does not inherit from AR
allows the "fill in" step to work with select
adds cuke for updating a work package

This is not yet completed but defines a simple use case
adds an update action to the work package controller
allows for the status to be set on planning elements
adds more attributes to work package update cuke
explicitly passes attributes to views
adds steps for work package hierarchy
enables notes to be set on edit
enables attaching files on edit
enables logging time on update