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()