Cleanup principles
Cleanup principles

I didn't really change much, just moved somes stuff around and expanded
a little more in number 5.

I moved all of the physical shipping container stuff to just the into
because while its a cute analogy, repeating it over and over just got
in the way of the real point - and by number 5 we endedup having more text
about shipping containers than our containers - which was just weird.

Signed-off-by: Doug Davis <ff3bde741799c0eff815b83a54eda3fc494df54f@us.ibm.com>

hqhq/specs,wangkirin/specs,hqhq/runtime-spec,marcosnils/specs,wking/opencontainer-runtime-spec,ChengTiesheng/specs,gao-feng/specs,runcom/specs,opencontainers/specs,ujuc/specs,laijs/specs,wking/opencontainer-specs,cloudfoundry-incubator/specs,vbatts/specs,jonboulle/specs,opencontainers/runtime-spec