[WIP] Feature/improve cli support

Makefile

@@ -0,0 +1,6 @@
+build:
+	go build -o glua ./cmd/glua
+	mv ./glua "$$GOPATH/bin"
+
+tests:
+	bash test/test.sh

README.md

@@ -1,7 +1,36 @@
 WARNING! Please expect breaking changes and unstable APIs. Most of them are currently at an early, experimental stage.
 
+# CLI usage 
+
+`glua` is the binary that calls the interpreter to run your `.lua` files, check the `glua help` for all the 
+flags and the options about running files. 
+
+# Building the CLI from source
+
+For Linux/macOS environments:
+	You should have the `make` build tool to build the `glua` command line interface.
+	After installing, just go to the root directory of this project, and run:
+
+	`make build`
+
+	This command will create a binary named `glua`, and move it to your `$GOPATH/bin` directory
+	If you want to use somewhere else in your computer, please, add the `$GOPATH/bin` directory
+	to your `PATH` environment variable.
+
+
 # Contributing
 
+## Prerequisites:
+	`luac`: You must have Lua compiled for your distribution.
+	`make`: You must have the build tool already installed.
+	`go`: You must have at least the Golang >= 1.11.2 to run the source code and tests.
+
+## Testing the installation
+
+This project have a extensive series of automated tests to make sure everything runs fine in your environment,
+you just have to use the `make tests` command to run all the tests.
+
+
 This project welcomes contributions and suggestions.  Most contributions require you to agree to a
 Contributor License Agreement (CLA) declaring that you have the right to, and actually do, grant us
 the rights to use your contribution. For details, visit https://cla.microsoft.com.

cmd/glua/main.go

@@ -13,6 +13,19 @@ var (
 	trace bool = false
 	debug bool = false
 	tests bool = false
+	usage string  = `
+glua [flags] [files]
+	flags available:
+		-debug: boolean -> Set it to true to enable verbose logging
+		-trace: boolean -> Set it to true to enable tracing
+		-tests: boolean -> This will run all the tests of the engine
+
+	files:
+		Pass the path for the script to be executed.
+
+glua help
+	Print this usage and exit.
+	`
 )
 
 func must(err error) {
@@ -31,7 +44,12 @@ func init() {
 
 func main() {
 	if flag.NArg() < 1 {
-		must(fmt.Errorf("missing arguments"))
+		must(fmt.Errorf("Missing arguments"))
+	}
+
+	if flag.Args()[0] == "help" {
+		fmt.Println(usage)
+		os.Exit(0)
 	}
 
 	var opts = []lua.Option{lua.WithTrace(trace), lua.WithVerbose(debug)}