Merge pull request #48 from JorisE/master

Fixed two issues in cli
Try adding space before Pane.send_keys commands so shell doesn't record a command in history.
v0.1.3
remove comment for old --log-level argument.  Use isinstance of string_types for checking choices in prompt_choices.
coding: utf8 fix space.
v0.1.4. Update changelog.
Fix link in CHANGES.
docs: Section headings.
docs: doc/index.rst reference now _index
CHANGES updates.
Add package_metadata from tony/cookiecutter-pypackage. Update setup.py and doc/conf.py
v0.1.5
Fix #49 package_metadata.py missing from MANIFEST.in
Update link in CHANGES.
Try to test removing self.server.tmux for default-path on new_window.
Try using -c start_directory in Session.new_window, remove the hack where we set-option default-path.
Update to show error params on new_window creation of builder.
Join list when raising error.
#35 expanduser of start_directory.  tmuxp 1.9-dev doesn't expand ~.
split_window now allows -c for start directory. #35