Add topology class for Shashlik

[andersonjacob]

Sunanda's Shashlik07 was giving me merge problems so I've re-based it solve the conflicts and created a new pull request.

[cmsbuild]

A new Pull Request was created by @andersonjacob for CMSSW_6_2_X_SLHC.

Add topology class for Shashlik

It involves the following packages:

Geometry/CaloEventSetup
Geometry/CaloTopology
Geometry/Records

@civanch, @Dr15Jones, @ianna, @mdhildreth, @cmsbuild, @nclopezo, @Degano, @ktf can you please review it and eventually sign? Thanks.
@ghellwig this is something you requested to watch as well.
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@andersonjacob, @mark-grimes you are the release manager for this.
You can merge this pull request by typing 'merge' in the first line of your comment.

[andersonjacob]

merge

passes tests with only known failures.