make emitting transform rib from procedural optional

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What steps will reproduce the problem?
1. make a Procedural call to an element of an alembic cache in rib
2.
3.

What is the expected output? What do you see instead?
the procedural will emit its own transform information.  The expected output 
would be to make that optional (a -notransform flag or or -onlygeometry or 
something).  That way for systems which emit their own transforms for pieces of 
alembic caches, this could be skipped.  

What version of the product are you using? On what operating system?
most recent; linux.

Please provide any additional information below.

Original issue reported on code.google.com by stephan....@gmail.com on 1 Apr 2011 at 8:41

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Original comment by ard...@gmail.com on 13 Apr 2011 at 6:22

• Added labels: Type-Enhancement, Component-Renderman, Component-Client
• Removed labels: Type-Defect

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Original comment by ble...@gmail.com on 7 Jul 2011 at 10:21

• Added labels: Milestone-General_Backlog, Priority-P2

[GoogleCodeExporter]

This is implemented with the -excludexform flag. In the next commit, that flag 
will also suppress AttributeBegin/Identifier/End blocks from being created 
around anything but geometric primitives.

Original comment by steve.lavietes@gmail.com on 1 Aug 2011 at 3:47

• Changed state: PleaseVerify

[GoogleCodeExporter]

This was available in 1.0.

Original comment by steve.lavietes@gmail.com on 26 Aug 2011 at 12:30

• Changed state: Verified