[discussion] Remove aliases

[Fuco1]

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Why?

See discussion in #212.

Transition plan

When we do the transition we can provide a file dash-compat.el or dash-aliases.el which people could require to keep the old code working with minimal effort, but we will deprecate them and remove from "core" and the documentation.

Ideas?

[wygulmage]

Will you keep the emacs-lisp style 'p' predicates or the scheme (clojure?) style '?' predicates? Query-type names (-select, -reject), more destructive names (-remove), or traditional functional programming names (-filter)?

[Wilfred]

For what it's worth, I think dash.el should prefer foo-p predicates over Scheme/Clojure-style foo?. The rest of Emacs uses -p and reading code that uses a mix is weird.