Use Bootstrap for Installer

fix #1062
refs #1073
Use Bootstrap for Installer #2

fixes
Use Bootstrap for Installer #3

minor css, opacity for #ZikulaOverlay
Use Bootstrap for Installer #4

change icons from glyphicons to FA
Use Bootstrap for Installer #5

a little bit FA
typo
Extra small icons replaced, refs #1073.
Merge pull request #1110 from phaidon/replace-small-icons

Extra small icons replaced, refs #1073.
Use Bootstrap for Installer #6

use bootstrap for input and select
Add install scripts and update dependencies to Symfony 2.4
Update README.md
Update README.md
Update .travis.yml
Update .travis.yml
Update .travis.yml
Use Bootstrap for Installer #7

use FA for Breadcrumbnav
Add missing bundle.
Fix travis build
small cosmetic
Merge pull request #1106 from dmm1/1.3

Use Bootstrap for Installer