1.0.0-alpha15

This release brings support for new Android Gradle Plugin Variant API for bytecode transformation, instead of deprecated Transform API and fixes several issues for multi-module usage:

• Lightsaber checks that @ImportedBy and @ProvidedBy annotations specify containers (Module, Component or ContractConfiguration) that belong to current inputs.
• Lightsaber verifies that @ProvidedBy annotation actually specifies a container, rather than an arbitrary class.
• Lightsaber analyses separate @Modules just like other containers. This way Lightsaber will account for @Modules that are not imported by any @Component or ContractConfiguration.
• Lightsaber no longer generates providers, factories and contracts for entities that do not belong to current inputs.