Rushd

Added
- Added new `rd.plot.debug_axes` which draws guide lines to help with axis alignment.
- Added new `rd.plot.adjust_subplot_margins_inches` which allows subplot configuring
using inch offsets (instead of subfigure coordinate offsets)

Modified
- `rd.flow.load_csv_with_metadata` and
`rd.flow.load_groups_with_metadata` can now load a subset of columns.
- The `datadir.txt` can include paths that use `~` to represent the home directory.
- `rd.plot.generate_xticklabels` does not include metadata key labels in plots without yticklabels
- `rd.plot.generate_xticklabels` no longer throws an error when xticklabels don't match the dictionary passed (instead leaves labels as-is)
- `rd.plot.generate_xticklabels` now enables user-specified line spacing

Added
- `rd.plot.generate_xticklabels` replaces a plot's existing xticklabels with specified metadata in a table-like format

Modified
- Updated the `rd.plot.plot_mapping` command to properly handle the single-numeric case.

Added
- `rd.plot.plot_well_metadata` to make nice plots corresponding to well metadata specified as a YAML file.

Added
- `rd.flow.load_groups_with_metadata` loads files from several folders (groups, e.g. corresponding to plates) into a single dataframe
Modified
- `rd.flow.moi` properly generates plots of MOI vs fraction infected for checking calculation accuracy
- `rd.well_mapper` properly handles metadata concatenation

Added
- `rd.flow.moi` calculates viral MOI, creating summary graphs and tables.
Modified
- `rd.outfile` now creates necessary subdirectories within rootdir/datadir.
- `rd.flow.load_csv_with_metadata` now allows `str` and `Path` arguments
- `rd.flow.load_csv_with_metadata` properly handles well IDs up to A1-P24 (384-well plate)
- `rd.flow.load_csv_with_metadata` fills unspecified metadata with `NA`