Allow Drush and SSH to accept remote commands as arguments.
Merge pull request #189 from pjcdawkins/drush-ssh-arguments

Allow Drush and SSH to accept remote commands as arguments.
Only warn about hooks on build if there are build hooks.
Clarify variable rebuild warning.
Merge pull request #190 from pjcdawkins/clarify-variable-rebuild-warning

Clarify variable:set and variable:delete rebuild warning
Clarify that build command is local.
Reduce ssh escaping so the command 'platform ssh -i ~/.ssh/id_rsa.pub' works.
Prevent using 'platform get' inside a project directory.
Ensure that 'platform get' to a lower dir will still build the right project.
Merge pull request #191 from pjcdawkins/prevent-recursive-get

Prevent using 'platform get' inside a project directory.
Work around 'operation not allowed' for a stale environment cache.
Refactor URL command (no functional change).
Refactor --project and --environment options.
Display global commands even if they have aliases.
Update README.md
Add 'docs' command.
Allow 'platform get' with no arguments.
Fix bug causing drush aliases to be recreated on every environments refresh.
Update Drush aliases after getEnvironment().
Merge pull request #194 from pjcdawkins/drush-aliases-on-get-environment

Update Drush aliases after getEnvironment()