Add global concurrency parameter. fix #56

Fix bug which caused pending actions to be run multiple times when pending time finished
Fix bug which caused
1. past pending actions to rerun on exit
2. maximum one pending action per pattern/action couple to run on exit

app/startup.go

@@ -6,6 +6,7 @@ import (
 	"log"
 	"os"
 	"regexp"
+	"runtime"
 	"strings"
 	"time"
 
@@ -15,6 +16,9 @@ import (
 )
 
 func (c *Conf) setup() {
+	if c.Concurrency == 0 {
+		c.Concurrency = runtime.NumCPU()
+	}
 
 	for patternName := range c.Patterns {
 		pattern := c.Patterns[patternName]
@@ -144,13 +148,11 @@ func parseConf(filename string) *Conf {
 
 	var conf Conf
 	if filename[len(filename)-4:] == ".yml" || filename[len(filename)-5:] == ".yaml" {
-		logger.Println(logger.DEBUG, "yaml")
 		err = jsonnet.NewYAMLToJSONDecoder(data).Decode(&conf)
 		if err != nil {
 			logger.Fatalln("Failed to parse yaml configuration file:", err)
 		}
 	} else {
-		logger.Println(logger.DEBUG, "json")
 		var jsondata string
 		jsondata, err = jsonnet.MakeVM().EvaluateFile(filename)
 		if err == nil {