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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rename *PlatForm to *Platform

in sv.write_to_file modified the prior/optimized identifier in function call to be prior/opt text instead of True/False

changed the function calls in order to remove need of sth.DaCycle = DaCycle in start_job. achieved by adding DaCycle to particular function calls and initializing tm5 with DaCycle as call parameter

added the get_covariance generic function to the sv baseclass

write_members_to_file: is called with _lag_ instead of lag +1, as inside there was a "lag-1" call... that one removed from inside as well

write_sample_info changed to take the whole path as a parameter: so now we explicitly see the path in pipeline, plus we don't need to return it back.
same for write_obs_to_file

managed imports in obs files

removed a need of using samples.DaCycle=DaCycle (now it is only passed in the "initialize" function)

removed StateVector.isOptimized and replaced with an "optimized" parameter in StateVector.write_to_file call

in obs and obspack_geocarbon adding some parameters to function calls

reverted to r1186 (the last one from 2012), with changes in observation files from r1192-1194 preserved

called from pipeline as call parameters
*warning* take care about get_covariance, it is called from baseclass's "propagate", whereas this function exists only in the derived class.

a lot of my helper comments, but they will disappear soon.

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()

added new routines for gridding to maps and TC regions, also moved the ensemble member writing method to the statevector object

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