add go build for build errors (#180)

* add go build for build errors

* Add go build to doc and README

* Improvement for Go build

Go build works on package level, so copy over the other files
that belong to the same package to the temp folder as well.

* revert back to simple go build

* change gobuild script var name

doc/ale.txt

@@ -73,7 +73,7 @@ The following languages and tools are supported.
 * Elixir: 'credo'
 * Elm: 'elm-make'
 * Fortran: 'gcc'
-* Go: 'gofmt -e', 'go vet', 'golint'
+* Go: 'gofmt -e', 'go vet', 'golint', 'go build'
 * Haskell: 'ghc', 'hlint'
 * HTML: 'HTMLHint', 'tidy'
 * JavaScript: 'eslint', 'jscs', 'jshint', 'flow'