Remove incorrect createDrushAliases() from getDomains().
Detect the current environment without using the upstream.

Developers should have the freedom to set other upstreams on their Git
branches.

Plus, there are other bugs e.g. issue #109 which mean that the upstream is not
set properly.
Try the remote first, and fall back to the branch name.
Update README.md
Require Symfony Console v2.5.

See https://github.com/platformsh/platformsh-cli/commit/cb63ba80781ccb5e6a79fd1e3a1be20588313a3a#commitcomment-7958045
Merge pull request #118 from pjcdawkins/domains-not-envs

Remove createDrushAliases() from getDomains().
Merge pull request #117 from pjcdawkins/better-current-env-test

Detect the current environment without using the upstream.
Better error message in the edge case of when the configured project ID can't be fetched.

Improves on the current PHP fatal 'unsupported operand type' error.

If you do get this error message then you should contact support.
Update symfony app and services config.
Pass through -v, -vv, -vvv and -q to drush make.
Pass through --concurrency to drush make.