PR 1635/cpukit
* porting/prioritybitmap.t: Refactoring of priority handling, to
isolate the bitmap implementation of priorities in the supercore so
that priority management is a little more modular. This change is in
anticipation of scheduler implementations that can select how they
manage tracking priority levels / finding the highest priority ready
task. Note that most of the changes here are simple renaming, to
clarify the use of the bitmap-based priority management.
* SUPPORT, LICENSE: New files.
* Numerous files touched as part of merging the 4.5 branch
onto the mainline development trunk and ensuring that the
script that cuts snapshots and releases works on the documentation.
