[slate] Avoid conflict with ClipMenu
[zsh] Remove obsolete alias. Use janus build-in

The alias for grepping git conflicts is `<leader>fc`.

This finds the next conflict marker (tested with Git conflicted files).

See https://github.com/carlhuda/janus#base-customizations
[zsh] Use single quotes
[zsh] Do not auto-correct `knife` commands
[git] Enhance log output
[git] Cleanup aliases
[zsh] Add `npm` bin to PATH

This allows us to use `npm` binaries which was not possible beforehand.
[README] Add `dash.vim` plugins

This Vim plugin will search for terms using the excellent Dash.app ,
making API lookups simple.

See https://github.com/rizzatti/dash.vim#readme