Inherit stdio for spawned git process

Enable user input while deploying.

Author: cy20lin

lib/deployer.js

@@ -57,7 +57,8 @@ module.exports = function(args) {
 
     return spawn('git', args, {
       cwd: deployDir,
-      verbose: verbose
+      verbose: verbose,
+      stdio: 'inherit'
     });
   }