Merge pull request #114 from garden-io/better-clean-command

chore: clean command now removes build dir and only cleans ignored files

package.json

@@ -113,7 +113,7 @@
     "add-licenses": "./bin/add-licenses",
     "build": "gulp build",
     "check-licenses": "./bin/check-licenses",
-    "clean": "git clean -x -f",
+    "clean": "rm -rf build && git clean -X -f",
     "dev": "gulp build && cd build && npm link && cd .. && gulp watch",
     "dist": "gulp dist",
     "fix-format": "node_modules/.bin/tslint -p . --fix && node_modules/.bin/tsfmt -r",