updating Drush version to account for lowercase as well
Merge pull request #17 from dudenhofer/lowercase_fix

updating Drush version to account for lowercase as well
Add the drush command.
Sync the drush error message with the build one.
Add a --no-build option to 'project:get' and 'environment:branch'.
Generate settings.php and settings.local.php when fetching / building a project.
Display the help command.
Move the marketplace url to a constant.
Allow SSL certificate validation to be turned off globally.
Don't attempt the build if git clone failed or the repository is empty.
Make sure the right Drush version is installed.
Reload the project list if the project is not initially found.
Add the directory-name argument to platform get.
getCurrentProject() must use getProject() to benefit from the cache reload logic.
Update README.md

Update the required Drush version.
Update README.md
Update composer.json
Fix the empty repository check in platform build.
Refine the build functionality.

- Fixes errors when there was nothing to build (whole site committed).
- Symlinks the repository instead of copying it.
Create a gitignore file on platform get.