itaps-parallel "All" convention

[Devine, Karen D]

In iMeshP, we have used the suffix "All" to indicate that a function must be
called collectively; examples include iMeshP_syncPartitionAll and
iMeshP_syncMeshAll.

We break that convention in two or three functions (at least):
-  iMeshP_WaitAll is not collective.
-  iMeshP_load is collective
-  iMeshP_save would often be collective.

So I propose the following changes:
-  change iMeshP_WaitAll to iMeshP_waitForAllRequests; change its siblings
to iMeshP_waitForRequest, iMeshP_waitForAnyRequest, etc.
-  change iMeshP_load to iMeshP_loadAll.
-  change iMeshP_save to iMeshP_saveAll.

Does anyone mind if I make these changes soon?  I realize they will make our
tutorial notes slightly incorrect, but since they are just name changes,
they shouldn't set back our development and we could at least have the
correct names in the exercises.

Karen