8183552: Move align functions to align.hpp
Reviewed-by: stuefe, pliden

8178499: Remove _ptr_ and _size_ infixes from align functions
Reviewed-by: rehn, tschatzl

8178836: Improve PtrQueue index abstraction
Summary: Prefer element indexes where possible.
Reviewed-by: shade, mgerdin

8175221: Cleanup DirtyCardQueueSet::concatenate_log
Summary: concatenate_log calls flush, flush no longer checks "permanent"
Reviewed-by: tschatzl, shade

8150676: Use BufferNode index
Summary: Maintain index and use it, removing extra checks for or stores of NULL.
Reviewed-by: jmasa, tschatzl

8139651: ConcurrentG1Refine uses ints for many of its members that should be unsigned types
Summary: ints need to be changed to size_t
Reviewed-by: kbarrett, tbenson

8150419: Cleanup BufferNode API
Summary: Fewer public functions, cleanup allocation.
Reviewed-by: tschatzl, drwhite

8143014: Access PtrQueue member offsets through derived classes
Summary: Moved accessors to derived classes and updated callers.
Reviewed-by: tschatzl, jmasa, twisti

6899049: G1: Clean up code in ptrQueue.[ch]pp and ptrQueue.inline.hpp
Summary: Simplify indexing, address obsolete code, improve access/type checking.
Reviewed-by: tschatzl, pliden

8079792: GC directory structure cleanup
Reviewed-by: brutisso, stefank, david