Change build directory to dist and cleanup NPM scripts (#1500)

* Move the build path to `dist`

* mkdir dist if not exists

* Remove build from .gitignore

* Delete `dist/` before building and when cleaning

lint_blacklist.txt

@@ -1,6 +1,5 @@
 .git
 
 # Autogenerated code
-build/**
 node_modules/**
 dist/**