Disable color when piping or redirecting.  Fixes GH #155.

Also, changed command-line options so you can enable or
disable colors with --color or --no-color.
Rename COLORS -> PALETTE.

I didn't like having attributes named "color" and "colors". Too similar.
Added PINTO_PAGER_OPTIONS.

Extra options for the pager, when using pinto.
Version the protocol used by pintod.

There are many opinions on how to version an API.
I followed GitHub and used media types via the
Accept header.

This will require both clients and servers to upgrade.
But after that, we can potentially support multiple
versions.
Edit change log.
Bump VERSION.

Just going for a development release, until I'm confident
about the protocol-versioning stuff.
Corrected documentation about output formats.
More doc edits
Change format of listing with --all option.
Merge branch 'topic/colorizing'

Conflicts:
	lib/Pinto/Constants.pm
Update change log.