refactor(commands): separate commands and its core into two folders (#32)

- I think it would be better if one for commands only, one for the spec
handling core logic so people won't be confused by the core logic inside
the commands folder (cleaner I guess)
- Regen docs

commands/js/meteor.go

@@ -1,14 +1,14 @@
 package js
 
 import (
-	"github.com/versenilvis/iris/commands/core"
+	"github.com/versenilvis/iris/spec"
 )
 
 func init() {
-	core.Register(&core.Spec{
+	spec.Register(&spec.Spec{
 		Name:        "meteor",
 		Description: "Run the meteor command-line tool",
-		Subcommands: []core.Subcommand{
+		Subcommands: []spec.Subcommand{
 			{Name: "help", Description: "Get help on meteor command line usage"},
 			{Name: "command", Description: "Built-in command"},
 			{Name: "list", Description: "Lists the packages that you have explicitly added to your project"},
@@ -32,7 +32,7 @@ func init() {
 			{Name: "members", Description: "Manage members of an organization"},
 			{Name: "publish-for-arch", Description: "Publish a package for the same architecture that you are currently on"},
 		},
-		Options: []core.Option{
+		Options: []spec.Option{
 			{Name: "--port", Description: "Port to listen on (instead of the default 3000)"},
 			{Name: "--inspect", Description: "Simulate production mode. Minify and bundle CSS and JS files"},
 			{Name: "--raw-logs", Description: "Run without parsing logs from stdout and stderr"},