Added --appPath option

* Added prompts for bootstrap and coffee
* Added .yo-rc.json file to store the preferences
Added Gruntfile and jshint task
Removed MariaBase

* rename templates/bower.json -> templates/_bower.json
* set default options.appPath to "app"
Added Twitter bootstrap

* appPath correction for index.html
* Generate main.scss file
* tests for bootstrap
* appPath correction in Gruntfile
* compass task on if bootstrap is selected
Updating index.html
Fix : set options when no prompts are used
Updated to generate and compile coffee
Generate index.html with plugins and vendor files
Add time-grunt, load-grunt-tasks & jshint-stylish
Adding tests for coffee
Adding generated scripts to index.html
Updated description for tests
Updating yeoman-generator to 0.14.0
Use writeFileSync instead of writeFile
Travis : adding node v0.10