Added new directory command to Quick Start section
Added new directory command to Quick Start section

Running the existing instructions without knowing how the generator works resulting in a mess of new files + directories in my home dir. No big deal, but it is a noob pitfall that could be easily avoided, so I thought I would mention it here.

Another solution would be to add the ability to specify a target directory to the generator tool, e.g. `actionhero generate my_new_project` that would create the `my_new_project` directory if it didn't already exist.
kodypeterson/actionhero,actionhero/actionhero,supamii/actionhero,katopz/actionhero,supamii/actionhero,witem/actionhero,insfere/actionhero,chimmelb/actionhero,witem/actionhero,mboudreau/actionhero,GoranDimchevski/actionhero,zitang/actionhero,witem/actionhero,actionhero/actionhero,GoranDimchevski/actionhero,vkarampinis/actionhero,mboudreau/actionhero,vkarampinis/actionhero,BoLaMN/actionhero,insfere/actionhero,gcoonrod/actionhero,mboudreau/actionhero,supamii/actionhero,dangerdespain/actionhero,actionhero/actionhero,crrobinson14/actionhero,vkarampinis/actionhero,zarnold/actionhero,S3bb1/actionhero,anjuncc/actionhero,supamii/actionhero,dangerdespain/actionhero,katopz/actionhero,crrobinson14/actionhero,zarnold/actionhero,BoLaMN/actionhero,zarnold/actionhero,katopz/actionhero,gcoonrod/actionhero,kodypeterson/actionhero,dangerdespain/actionhero,gcoonrod/actionhero,dangerdespain/actionhero,anjuncc/actionhero,kodypeterson/actionhero,chimmelb/actionhero,insfere/actionhero,zitang/actionhero,gcoonrod/actionhero,anjuncc/actionhero,BoLaMN/actionhero,S3bb1/actionhero,actionhero/actionhero,zitang/actionhero,S3bb1/actionhero,crrobinson14/actionhero,GoranDimchevski/actionhero,chimmelb/actionhero,witem/actionhero