Initial stab at API structuring (#1711)

build.gradle

@@ -163,10 +163,29 @@ sourceSets.main.resources {
     srcDir 'src/generated/resources'
 }
 
+task srcJar(type: Jar) {
+    from(sourceSets.main.java)
+    classifier = 'sources'
+}
+
+task apiJar(type: Jar) {
+    from(sourceSets.main.allJava)
+    from(sourceSets.main.output)
+    include 'wayoftime/bloodmagic/api/**'
+
+    classifier = 'api'
+}
+
+artifacts {
+    archives srcJar, apiJar
+}
+
 publishing {
     publications {
         mavenJava(MavenPublication) {
             artifact jar
+            artifact srcJar
+            artifact apiJar
         }
     }
     repositories {