Update workout visualization page

Add new style and the fields for each model in the visualization
page.
Merge pull request #63 from MateusZitelli/wip/workout_visualization_page

Add first fully functional version of the workout page visualization
Merge remote-tracking branch 'origin/wip/workout_visualization_page' into wip/static-frontend-serving
Update grunt tasks

Add tasks to minify images, vectors, css and js and concatenate css and js.
Add new rule in gitignore and new packages

Add rule to ingore compiled css files in gitignore and add new
dependencies in bower.json and package.json.
Change in the stylesheet, index and workout creation page

Add support to a saved state in workout creation, new index page.
Delete old file