change css and javascripts imports
class replacements

.row-fluid -> .row
.span* -> .col-md-*
.offset* -> .col-md-offset-*
.brand -> .navbar-brand
.nav-collapse -> .navbar-collapse
.nav-toggle -> .navbar-toggle
.btn-navbar -> .navbar-btn
.btn -> .btn .btn-default
.btn-mini -> .btn-xs
.btn-small -> .btn-sm
.alert-error -> .alert-danger
.control-group.warning .control-group.error .control-group.success	 ->
.form-group.has-*
.input-prepend .input-append	 -> .input-group
.add-on -> .input-group-addon
.muted -> .text-muted
.text-error -> .text-danger
menu migration

- remove .navbar-inner
- refactor the global menu structure
- change navbar menu header class to .dropdown-header