Adding in/out file validation

toolflow/src/main/scala/com/minres/tgc/hammer/Main.scala

@@ -1,6 +1,9 @@
 package com.minres.tgc.hammer
 
+import ch.qos.logback.classic.Level
 import com.minres.tgc.hammer.cli.{HammerConf, MySubcommand}
+import com.typesafe.scalalogging.Logger
+import org.slf4j.LoggerFactory
 
 import scala.compiletime.uninitialized
 
@@ -8,8 +11,19 @@ object Main {
   var conf: HammerConf = uninitialized
 
   def main(args: Array[String]): Unit = {
+    var logger = Logger("TGCHammer")
     conf = new HammerConf(args.toIndexedSeq)
 
+    val logLevel = conf.verbose() match {
+      case 0 => Level.WARN
+      case 1 => Level.INFO
+      case 2 => Level.DEBUG
+      case _ => Level.TRACE
+    }
+    LoggerFactory.getLogger(org.slf4j.Logger.ROOT_LOGGER_NAME).asInstanceOf[ch.qos.logback.classic.Logger].setLevel(logLevel)
+
+    os.makeDir(Global.OUT_DIR)
+    os.makeDir(Global.TMP_DIR)
     conf.subcommand match {
       case Some(c: MySubcommand) =>
         val tasks = c.getRequiredTasks