Added extensible prompt facility to io.sys and wrote a small unit test
Added extensible request and response for context managers
Applied some pep8 spaces which were lacking
changed request_prompts to prompt_responses
Handle connection failures due to server load

SSHException with "Error reading SSH protocol banner" is raised when
sshd is unresponsive but Fabric treats it as an auth failure. This patch
fixes this by treating it as NetworkError.
Add a changelog entry for #948
Add Python 2.7 trove classifier to setup.py
Merge pull request #977 from akitada/add-py27-classifier

Add Python 2.7 trove classifier to setup.py
Tweak travis IRC notifs
Add Python 2.7 trove classifier to setup.py
Merge branch '1.6' into 1.7
Merge branch '1.7' into 1.8
Merge branch '1.8'
Overhaul roadmap page
merged the changes of @owenn into the new master branch and the a few changes to make it nicer
env can be accessed directly - no param needed
use 'prompts' instead of 'prompt_responses', seems to be the better shorter name
cleaned up tests, removed unnecessary _AliasDict, pep8
add prompts change to changelog
prompts documentation in usage/env.rst