[X10-core] Array related changes in progress in svn head

[David P G. <gr...@us...>]

We're starting the next phase of the Array related class library changes
this week.
	(0) we changed the backing storage for Array and DistArray from
IndexedMemoryChunk to Rail (done earlier today).
	(1) we're going to stop auto-importing the x10.array package
	(2) the packaged x10.array will be renamed to x10.regionarray
	(3) stabilize all test cases
	(4) start work on new x10.simplearray classes.

So, expect a number of Array related changes this week.  Probably best to
not track the svn head unless you are actively working on either these
changes or other Rail related work.

--dave