Oligopool

1. Changed automatic padding constraints.
2. Introduced design of constants as a motif type.
3. Added Orphan Oligo indicators to `motif` and `spacer`.
4. Updated the oligo length limit parsing.
5. Updated edge-effect calculation in `pad`.
6. Removed `bounter` since deprecated.
7. Switched to `ShareDB`.
8. Added robust parallelization for POSIX systems.

1. Fix edge extraction and edge-effect length calc.
2. Update `barcode` to include returning orphan oligos on failure.

1. Drop two-bit encoding idea.
2. Use set-based non-repetitiveness per context.

1. Updated stats variables in `final` and `lenstat`.
2. Added `revcomp` and `merge` auxiliary modules.
3. Bugfix in `utils`.

1. Updated `OligopoolCalculatorInAction.ipynb`.
2. Updated `acount` and `xcount`.

1. Updated `README.md`.
2. Updated `OligopoolCalculatorInAction.ipynb`.
3. Removed shell scripts -- don't need 'em.
4. Updated `index`, `background`, `lenstat`, `pack`, `acount`, and `xcount`.
5. Updated `design_parser.py`.
6. Updated `analysis_pipeline.py`.