add artist clearcache command

Artist/Clearcache.php

@@ -0,0 +1,53 @@
+<?php
+namespace RedCat\Framework\Artist;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+class Clearcache extends Artist{
+	protected $description = "Clear the content of .tmp directory at root of application";
+
+	protected $args = [];
+	protected $opts = [];
+
+	protected $output;
+	protected function execute(InputInterface $input, OutputInterface $output){
+		$this->output = $output;
+		$path = $this->cwd.'.config.php';
+		$rm = $this->rmdir($this->cwd.'.tmp');
+		if($rm===true)
+			$this->output->writeln('cache cleaned');
+		elseif($rm===false)
+			$this->output->writeln('cache cleaning failed');
+		else
+			$this->output->writeln('cache was allready empty');
+	}
+	private function rmdir($dir){
+		if(is_dir($dir)){
+			$dh = opendir($dir);
+			if($dh){
+				while(false!==($file=readdir($dh))){
+					if($file!='.'&&$file!='..'){
+						$fullpath = $dir.'/'.$file;
+						if(is_file($fullpath)){
+							if(unlink($fullpath))
+								$this->output->writeln('deleted '.$fullpath);
+							else
+								$this->output->writeln('deletion failed '.$fullpath);
+						}
+						else{
+							self::rmdir($fullpath);
+						}
+					}
+				}
+				closedir($dh);
+			}
+			if(rmdir($dir)){
+				$this->output->writeln('deleted '.$dir.'/');
+				return true;
+			}
+			else{
+				$this->output->writeln('deletion failed '.$dir.'/');
+				return false;
+			}
+		}
+	}
+}