* Reword lots of instances of 'will'
* Reword lots of instances of won't
* Reword lots of instances of we'll
* Eradicate you'll
* Eradicate 'be able to' type of phrases
* Eradicate 'unable to' type of phrases
* Eradicate 'has / have to' type of phrases
* Eradicate 'note that' type of phrases
* Eradicate 'in order to' type of phrases
* Redirect to official Chef and Puppet docs
* Eradicate gratuitous 'please'
* Reduce use of e.g.
* Reduce use of i.e.
* Reduce use of N.B.
* Get rid of 'sexagesimal' and correct some errors
* Docs: Remove duplicated `amazonec2-userdata` flag
* Docs: Remove duplicate content aws-driver/Options list
* Docs: Order list (ASC) Environment variables and default values
Update Google and Rackspace default image to Ubuntu 16.04, as
docker/machine#3888 has been merged.
Add new options docs for aws, gce, rackspace and virtualbox drivers.
Signed-off-by: Tao Wang <twang2218@gmail.com>
Added ca-central-1 AMI ID (SOURCE: 099720109477/ubuntu/images/hvm-ssd/ubuntu-xenial-16.04-amd64-server-20161013), changed Ubuntu version to 16.04 LTS
Signed-off-by: Shayne Wang <shaynexwang@gmail.com>