fixes pathing issues on non linux/unix based oses (windows) (#22)

* fixes pathing issues on non linux/unix based oses (windows)

* converted tabs to spaces

Author: echopoint

example/index.js

@@ -4,7 +4,7 @@ const Server = require('../');
 
 const port = process.env.PORT || 7005;
 
-const git = new Server(path.resolve(__dirname, 'tmp'), {
+const git = new Server(path.normalize(path.resolve(__dirname, 'tmp')), {
     autoCreate: true,
     authenticate: (type, repo, username, password, next) => {
       console.log(type, repo, username, password); // eslint-disable-line

lib/git.js

@@ -145,11 +145,7 @@ class Git extends EventEmitter {
         this.dirMap = repoDir;
     } else {
         this.dirMap = (dir) => {
-          if(dir) {
-            return path.resolve(repoDir, dir);
-          } else {
-            return repoDir;
-          }
+            return (path.normalize(dir ? path.resolve(repoDir, dir) : repoDir));
         };
     }
 
@@ -189,9 +185,9 @@ class Git extends EventEmitter {
    */
   mkdir(dir, callback) {
       // TODO: remove sync operations
-      const parts = this.dirMap(dir).split('/');
+      const parts = this.dirMap(dir).split(path.sep);
       for(var i = 0; i <= parts.length; i++) {
-          const directory = parts.slice(0, i).join('/');
+          const directory = parts.slice(0, i).join(path.sep);
           if(directory && !fs.existsSync(directory)) {
               fs.mkdirSync(directory);
           }