* allow using swept area for flicker turbine blades
* more cases for wind direction effect on turbine shadow
* Add shadow by hourly; add weight_option argument to flicker classes; update tests
* add wind_dir as input and pass to turbine shadow calcs; remove temporary file generation; parallelize turbine shadow calcs
* fix bug in create_pv_string_points
* add flicker by hours shaded map; fix normalization to be by how many selected intervals rather than entire year
* add option to exclude tower shadow; tests for subhourly runs
* fix subhourly poa
* speed up _calculate_shading()
* extend flicker example; speed up partial simulations; add documentation
* update examples and release version 0.0.2 with new flicker changes