fix #157
new application layout
Dried up the navbar, closes #172
Merge branch 'dev' into test_joaquin

Conflicts:
	app/assets/javascripts/bpmn.js
	app/assets/stylesheets/style.css.scss
	app/views/sandboxes/show.html.erb
new toolbar
Merge pull request #173 from ciudadanointeligente/test_joaquin

Test joaquin
fix #120 #137 #152

120 - arrows only on top of other elements
137 - save occur more frequently
152 - prevent strange arrow appears
indentation fix
wip
icon aligment
fix #176

erro when try to edit a sandbox
add a "/" to main logo
add a browser update banner