Update docs with boto3 req.

Fixes #362

README.rst

@@ -118,7 +118,7 @@ Amazon EC2 EBS backed AMI
     user@host:~$ sudo -i # become root
     root@host:~# git clone https://github.com/andsens/bootstrap-vz.git # Clone the repo
     root@host:~# apt-get install debootstrap python-pip # Install dependencies from aptitude
-    root@host:~# pip install termcolor jsonschema fysom docopt pyyaml boto # Install python dependencies
+    root@host:~# pip install termcolor jsonschema fysom docopt pyyaml boto3 # Install python dependencies
     root@host:~# bootstrap-vz/bootstrap-vz bootstrap-vz/manifests/official/ec2/ebs-jessie-amd64-hvm.yml
 
 To bootstrap S3 backed AMIs, bootstrap-vz will also need the

bootstrapvz/providers/ec2/README.rst

@@ -130,9 +130,9 @@ Example:
 Dependencies
 ------------
 
-To communicate with the AWS API `boto <https://github.com/boto/boto>`__
-is required (version 2.14.0 or higher) you can install boto with
-``pip install boto`` (on wheezy, the packaged version is too low). S3
+To communicate with the AWS API `boto3 <https://github.com/boto/boto>`__
+is required you can install boto with
+``pip install boto3`` (on wheezy, the packaged version is too low). S3
 images are chopped up and uploaded using
 `euca2ools <https://github.com/eucalyptus/euca2ools>`__ (install with
 ``apt-get install euca2ools``).