Support for base projects which do not contain the Bukkit API.

Also fixes a bug where root and plugin couldn't exist in the same project.

samples/shared/src/main/kotlin/lgbt/mystic/foundation/concrete/sample/helloworld/HelloWorldPlugin.kt

@@ -0,0 +1,13 @@
+package lgbt.mystic.foundation.concrete.sample.helloworld
+
+import org.bukkit.plugin.java.JavaPlugin
+
+class HelloWorldPlugin : JavaPlugin() {
+  override fun onEnable() {
+    slF4JLogger.info("Enabled Hello World")
+  }
+
+  override fun onDisable() {
+    slF4JLogger.info("Disabled Hello World")
+  }
+}

samples/shared/src/main/resources/plugin.yml

@@ -0,0 +1,9 @@
+name: HelloWorld
+version: '${version}'
+main: lgbt.mystic.foundation.concrete.sample.helloworld.HelloWorldPlugin
+api-version: 1.18
+prefix: HelloWorld
+load: STARTUP
+authors:
+  - kubelet
+  - kexec