Update README.md

Merge pull request #1 from HenriqueSilverio/uninstall

Add uninstall file

fixed gruntfile

fixed grunt shell svn_remove task

updated the README.md

added new LICENSE.txt file

added new empty index.php files

created admin and public folders for assets

updated the main file

updated the required version in readme.txt

updated the grunt tasks

added wp jshint standard

fixed .editorconfig

updated tasks