simple minimalistic watch for go project
runw <folder-containing-go-files-to-watch> <go-file-to-run-on-change>
// non recursive
runw -r <folder-containing-go-files-to-watch> <go-file-to-run-on-change>
// recursive watcher
runw ./src main.go
or
runw blockchain.go main.go
// will run main.go on change to blockchain.go
or
runw -r ./src ./src/main.go
// for recursive