Tweak the gradle config

Makefile

@@ -5,13 +5,17 @@ ifdef module
 mm = :${module}:
 else 
 mm = 
-endif 
+endif
 
 clean:
+	rm -rf .nextflow*
+	rm -rf work
+	rm -rf build
+	rm -rf plugins/*/build
 	./gradlew clean
 
 compile:
-	./gradlew compileGroovy
+	./gradlew :nextflow:exportClasspath compileGroovy
 	@echo "DONE `date`"
 
 
@@ -44,6 +48,8 @@ else
 	./gradlew ${mm}test --tests ${class}
 endif
 
+assemble:
+	./gradlew assemble
 
 
 #