adds a .gitkeep file to the images and templates folders

brings consistency with the behaviour of https://github.com/balderdashy/sails-generate-backend/pull/3
Update sails.io.js
0.10.14
Merge pull request #8 from delight/gitkeeper

adds a .gitkeep file to the images and templates folders
Merge pull request #9 from CalvertYang/master

Add Jade template support
Fixes directory path typo in 8fdbc54b7897ba6ff97ff513a055520de668d0c4
0.10.15
Update sails.io.js
0.10.16