Bump version: 1.3.0 → 1.3.50
Change repo URL from marmalade to our own.

Marmalade has been broken for weeks now. We are providing our own
repository for Elpy now until a suitable solution can be found.
Use elpy ELPA in Cask
elpy-project--find-root: Respect Projectile project root.

Elpy will now use the Projectile project root when it is available,
otherwise defaulting to its own heuristic.

Thanks to Chris Rose for the idea.
Do not override a valid python-check-command.

When configuring flake8 support, Elpy will now not override an
existing and valid python-check-command anymore. If the user
configures a program there, we'll just assume they know what they're
doing.

Thanks to kshramt for the idea and initial pull request (#198).
Compatibility alias for python-shell-send-string.

This function is not available in Emacs 24.2 and earlier, so we
now provide a compatibility alias. This commit also provides a
feature test in case we forget such compatibility in the future.

Fixes #202