composer_manager 7.x-1.8

Changes since 7.x-1.7:

• #2527120 by thewilkybarkid: Add autoload-dev support
• #2521702 by thewilkybarkid: New line at end of composer.json
• #2545680 by c4rl, Mark Trapp: Autobuild settings are not honored on the CLI
• #2567885 by Deciphered: Error creating directory: public://composer in composer_manager_file_dir()
• #2453721 by manu manu: Add possibility to set config keys in modules composer.json
• #2501011: PHP Fatal error: Call to undefined function composer_manager_file_dir()
• #2465517 by bfcam: Change hook_init to hook_boot
• #2466871: hook_composer_dependencies_install() can't load newly added libraries.
• #2323889 by Nick_vh, deviantintegral: Add prefer-stable to the list of components to be merged in composer-manager
• Fix using non-local file schemes.
• Use composer_manager_file_dir() for all path calls.
• #2430483: Add Composer Manager Security Advisory module.
• #2390479 by mkalkbrenner, joshtaylor: Creation of relative autoload path fails on symlinks
• #2340759 by nhoag: Respect composer_manager_vendor_dir value from settings.php on install