ERT-427 - Python "layer" for enkf_plot_blockvector and enkf_plot_blockdata
ERT-427 - Python "layer" implemented fetcher for plot data
ERT-427 - Python "layer" unit test for ObsVector report step iterator
ERT-427 - Add Missing functions in block_obs C layer
ERT-427 - Python "layer" implemented plot data fetchers for block data
ERT-427 - Python "layer" added support for add/remove panels based on data key types
Merge pull request #346 from iLoop2/block_obs_plot_data

ERT-427 Block obs plot data python layer