WB updates according to the workshop discussions

weight_and_balance_analysis/src/datapostprocessing.py

weight_and_balance_analysis/src/datapreprocessing.py

weight_and_balance_analysis/src/readlayertext.py

...alysis/src/tube_and_wing/standard/basic/acommodationIO.py

...lysis/src/tube_and_wing/standard/basic/componentMassIO.py

...ysis/src/tube_and_wing/standard/basic/massPropertiesIO.py

..._analysis/src/tube_and_wing/standard/basic/methodbasic.py

...analysis/src/tube_and_wing/standard/basic/propulsionIO.py

...lance_analysis/src/tube_and_wing/standard/basic/tankIO.py

...lysis/src/tube_and_wing/standard/basic/transportTaskIO.py

...is/src/tube_and_wing/standard/general/methodhtmlreport.py

...analysis/src/tube_and_wing/standard/general/methodplot.py

...sis/src/tube_and_wing/standard/general/methodtexoutput.py

...sis/src/tube_and_wing/standard/general/methodxmlexport.py

...analysis/src/tube_and_wing/standard/test_basic/test_IO.py

...src/tube_and_wing/standard/test_basic/test_methodbasic.py

...s/src/tube_and_wing/standard/usermethoddatapreparation.py

weight_and_balance_analysis/weight_and_balance_analysis.py

...and_balance_analysis/weight_and_balance_analysis_conf.xml