added Gruntfile and defined tasks.
added template folders to make all the plugins with same struture
Add Submodule into version control
add some notes about how to add plugin to this repo
move reademe/grunt-contrib-cssmin-v0.7.0.md to grunt-contrib-cssmin/README.md
Add Submodule into version control
move reademe/grunt-contrib-jshint-v0.8.0.md to grunt-contrib-jshint/README.md
delete the readme folder