Use custom dependency resolution

- Use Apache Ivy to resolve artifact URLs
- Update build model with full artifact IDs
- Generate Maven module metadata to support dynamic version constraints
- Resolve snapshot versions and generate snapshot metadata
- Add test fixtures and rewrite Gradle plugin tests
- Update dependencies

gradle.properties

@@ -0,0 +1,3 @@
+org.gradle.jvmargs='-Dfile.encoding=UTF-8'
+
+VERSION=1.0.0-rc1