Create basic cap utility

.gitignore

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+*.swp
+
+cap

main.go

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+package main
+
+import (
+	"code.as/captureas/go-captureas"
+	"fmt"
+	"os"
+)
+
+func main() {
+	if len(os.Args) < 2 {
+		fmt.Println("usage: cap [url]")
+		os.Exit(1)
+	}
+	url := os.Args[1]
+
+	c := captureas.NewClient("", "")
+	fmt.Println(c.Capture(&captureas.CaptureParams{
+		URL:    url,
+		Width:  800,
+		Height: 600,
+	}))
+}