Update README, add link to issue queue.

Auto-upload cgr.phar to GitHub on every tagged release.

Do not pass the project as an argument to the 'update' command.

Use XDG in the same way that Composer does.

Fix typo in 2.0.1 that breaks cgr on systems that do -not- define COM…

…POSER_HOME.

Support COMPOSE_HOME, and recognize 'cgr --help' in addition to 'cgr …

…help'.

Merge pull request #11 from consolidation/no-passthrough

Remove cgr feature that passes unknown commands through to composer.

Support --stability flag for cgr require.

Allow 'update' to update all cgr-installed projects when called with …

…no parameters.

Add update and remove commands.