Initial commit
test
removed test
Merge pull request #1 in ~SIMON.STANLEY/tools from test to master

* commit '7bfa2f056164e2d3da1af36391a1a864ce22db94':
  removed test
Added IssuedForecastData class to DataSets
Added PDF function to stats_functions
Merge branch 'master' of ssh://exxgitrepo:7999/~simon.stanley/tools
Added option to get data from margarets file in IssuedForecasData, added docs to stats_functions
Documentation updates and small tweeks
Neaten IssuedForecastData to make more readable.
Corrected docs in DataSets. Updated area analysis method to check if cube has bounds.
Added masking functions but may need development
Added multiple pdf functions and array_correlation function
Raise warning if current obs data in IssuedForcastData doesn't exist.
Added subplot labeling option to postage_plot
made directory for IssuedForecastData changeable.
Added spread shift and blend functions.
Added Seasons calendar class.
Moved variable and period globals inside IssuedForecast class.
Raise exception when data not found in IssuedDataForecast class