avoid confusing with salt-cloud
rewrite some sentences
add document for installing salt-cloud on Ubuntu

as saying that salt cloud is merged to Salt may cause confusing
make user thinks no need to install salt-cloud pkg
add basic usage doc for salt-cloud
Consolidate duplicate bind docs of docker.running

The documentation for `docker.running` had two divergent definitions for the `bind` argument. I've consolidated them and added some explanation of the two forms.
add lxc integration tests
modules.lxc: fix referenced before assignment error
use a faster template (sshd) for lxc integration tests
Clean keyboard exit in test suite
Add missing <ul>[…]</ul> around list elements in sidebar TOC.
Updated the contributing guide with a link to the documentation contribution docs.
Fixed some spacing issues in the contributing docs.
Merge pull request #14097 from mgwilliams/lxc

add lxc integration tests
Don't calculate sum on stat
Add headers to the 2014.7.1 to release notes, more to come
clean up stacks better in raetchannel
Small pylint fix in salt.daemons.flo.core
Merge pull request #14107 from rallytime/pylint_fix

Small pylint fix in salt.daemons.flo.core
Merge pull request #14083 from hvnsweeting/hvn-doc-update

Salt virt/cloud doc update
Merge pull request #14092 from eykd/patch-2

Consolidate duplicate bind docs of docker.running