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/sys/zapier.go

@@ -1,14 +1,14 @@
 package sys
 
 import (
-	"github.com/versenilvis/iris/commands/core"
+	"github.com/versenilvis/iris/spec"
 )
 
 func init() {
-	core.Register(&core.Spec{
+	spec.Register(&spec.Spec{
 		Name:        "zapier",
 		Description: "Change the way structured data is presented. If",
-		Subcommands: []core.Subcommand{
+		Subcommands: []spec.Subcommand{
 			{Name: "build", Description: "Build a pushable zip from the current directory"},
 			{Name: "path", Description: "Relative to your current path - IE: `.` for current directory"},
 			{Name: "delete:integration", Description: "Delete your integration (including all versions)"},
@@ -50,7 +50,7 @@ func init() {
 			{Name: "help", Description: "Display help for zapier"},
 			{Name: "command", Description: "Command to show help for"},
 		},
-		Options: []core.Option{
+		Options: []spec.Option{
 			{Name: "-f", Description: "Show extra debugging output"},
 			{Name: "-m", Description: "Build a pushable zip from the current directory"},
 			{Name: "-t", Description: "The template to start your integration with"},