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/ops/ansible_config.go

@@ -1,14 +1,14 @@
 package ops
 
 import (
-	"github.com/versenilvis/iris/commands/core"
+	"github.com/versenilvis/iris/spec"
 )
 
 func init() {
-	core.Register(&core.Spec{
+	spec.Register(&spec.Spec{
 		Name:        "ansible-config",
 		Description: "View ansible configuration",
-		Subcommands: []core.Subcommand{
+		Subcommands: []spec.Subcommand{
 			{Name: "list", Description: "List and output available configs"},
 			{Name: "CONFIG_FILE", Description: "Path to configuration file"},
 			{Name: "TYPE", Description: "Plugin type"},
@@ -18,7 +18,7 @@ func init() {
 			{Name: "init", Description: "Initializes a new config file (to stdout)"},
 			{Name: "FORMAT", Description: "Output format"},
 		},
-		Options: []core.Option{
+		Options: []spec.Option{
 			{Name: "--help", Description: "Show help and exit"},
 			{Name: "--verbose", Description: "Verbose mode (-vvv for more, -vvvv to enable connection debugging)"},
 			{Name: "-v", Description: "Verbose mode (-vvv for more, -vvvv to enable connection debugging)"},