Revert "Clarify backwards compatibility for major version 0"
Revert "Clarify backwards compatibility for major version 0"

This reverts commit 0f25f18b9b6dd315ba357d7f4f10d636474d7994, #253.
Now that we're on to 1.0, we don't need to talk about 0.x.  And the
lack of 0.x backwards compatability is covered by SemVer 2.0 section 4
[1]:

  Major version zero (0.y.z) is for initial development.  Anything may
  change at any time.  The public API should not be considered stable.

so removing the echo from our spec doesn't actually change anything.

The conflict is due to 4e63ee0a (config: qualify the name of the
version field, 2016-01-13, #309), and only impacted the context and
line-wrapping around the sentence I'm removing.

Conflicts:
	config.md

[1]: http://semver.org/spec/v2.0.0.html

Signed-off-by: W. Trevor King <f75897670c17327c42ab201733fb8a81ff9f4c34@tremily.us>

hqhq/runtime-spec,hqhq/specs,vbatts/specs,laijs/specs,jonboulle/specs,wking/opencontainer-specs,opencontainers/runtime-spec,ujuc/specs,opencontainers/specs,wking/opencontainer-runtime-spec,cloudfoundry-incubator/specs