chore bower: remove underscore dependency

Undersocre was used only to do an `indexOf` in an array in the select directive. By using
the default javascript `indexOf`, we can remove a dependency for the project.
chore demo: update installation page
chore readme: update last release link to tag list in github
fix fab: action buttons position

Fix buttons position according to new buttons sizes.
chore demo: enhance fab visibility
chore demo: buttons sizes according to new sizes
chore demo: enhance installation page style
feat search-filter: create search filter component

http://www.google.com/design/spec/components/text-fields.html#text-field
s-search-filter
chore demo: add search filter example
chore demo: fix css search filters toolbar
chore demo: fix space in demo html file