Do not convert input prompt to bytes

Python 3 input() takes str objects. Encoding the prompt makes it
a bytestring, resulting the b'' format.
Add VCS-hosted templates to vision.
Ping not just @audreyr but any core committer.
Add core committers section.
Feature core committer team in readme, minor edits.
Merge pull request #192 from uranusjr/fix_98

Do not convert input prompt to bytes
Merge branch 'master' of https://github.com/audreyr/cookiecutter

Conflicts:
	cookiecutter/prompt.py