A robust shell manager for fish

Long time Oh My Fish! contributor and the person responsible for the Wahoo/OMF merge. If you see Oh My Fish! history for August 27, 2015, you can figure it out.

Here is another take at the let me manage your shell goods, Fisherman.

> https://github.com/fisherman/fisherman

This project was built from the ground up using an entirely different and more ambitious design, forged over 4 months of semi-private development. This is my most valuable contribution to the fish-shell community.

I think the best features of Fisherman are: strong UNIX ties and familiarity, minimalistic design, flat tree structure, unified plugin system, external self-managed database, cache mechanism, dependency manifest file, compatibility with Oh My Fish! and Wahoo, extensive documentation and examples and quick shell start.

Fisherman ameliorates the slow shell start problem using a flat dependency tree instead of loading a directory hierarchy per plugin. This also means that Fisherman performance does not decline depending on the number of plugins installed.

Thanks if you read this far and happy new year!