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This commit will allow the basic CTDAS code to run, using baseclasses obs.py, observationoperator.py, pipeline.py, and optimizer.py.

The observations created now are a simple list of 10 values, which get added a random white noise by the obs operator.

Next challenge is to also bring in statevector.py from the baseclass as well, without dependencies on external files.

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baseclass observationoperator now returns randomized observations as simulated values, without running an external model

baseclass observationoperator now returns randomized observations as simulated values, without running an external model

rename *PlatForm to *Platform

performed actions discussed in email #2
removed unused __str__ functions
a bit of ordering of the pipeline.py

got rid of the getid and getversion functions (replaced with direct references to identifiers when used)
did a cleanup to dagridded/statevector

made cleanup in tm5_obsoperator
changed functions names - part 1
removed empty Validate function in obs, as well as its call
removed empty Initialize function in dasystem, as well as its call in pipeline (it's still called in some main functions)

- reduced to one the two-command messages logging 
- removed unnecessary commas and brackets in tuples definition
- removed unused imports
- __str__ definition: changed print to return
- removed unused values attribution ("dummy = ...")
- formatted the code
- repaired bad indentation
- removed dummy returns ("return None")
- removed non-meaning body of baseclasses.optimizer.Localize()

changed some of the initialization logic. Now, the DaCycle object has become internal to the obsoperator, sample, and statevector objects

Modified the method in which save/restart data is propagated. The observation operator now handles its own start/restart files in its private directory, and
passes the information of data that is needed for a restart to the DaCycle through a list. This list gets appended by all methods, and at the end all files of that
list are copied to the restart/current directory. The contents of that directory replace the restart/one-ago directory at the end of the cycle.