Bug 16239: Update Bootstrap to 3.3.7

Bug 16239: Update Bootstrap to 3.3.7

Customization tool used.

Javascript modules:
    alert
    button
    dropdown
    modal
    tooltip
    popover
    transition

CSS modules:
    type
    code
    grid
    tables
    forms
    buttons
    responsive-utilities
    button-groups
    input-groups
    navs
    navbar
    breadcrumbs
    pagination
    pager
    labels
    badges
    thumbnails
    alerts
    progress-bars
    media
    list-group
    panels
    responsive-embed
    close
    component-animations
    dropdowns
    tooltip
    popovers
    modals

Test plan:
1) Apply the patch
2) Try to go through interface to find problems, inconsistencies, etc.
3) Read the diff

Migration guide for bootstrap: http://getbootstrap.com/migration/

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>