1.4.0

• Ignore the core packages composer.json & composer.lock files when installing the core from vendor by default (#26)
• Added the option magento-core-package-type to make the core package type configurable. By default it is set to magento-core. Useful if your core package has a type of magento-source or similar (#33).
• Fix some odd behaviour with file excludes (#34)
• Drop support for php 5.3 & 5.4(#42)
• Fix package event type hint (#41)