Reformatting and renaming, addressing a few items raised by static analy...

...sis.  Also avoid creating and immediate resizing of EWAHCompressedBitmap on construction if size is known.

The code has been reformatted to the more usual 4 character indent and 120 character wrapping (actually I typically use 118 as it fits in the diff view on github).

This PR should have no API changing modifications.