Merged Michael's upgrading_bootstrap

Primary author: Michał Podlecki <m.podlecki@op.pl>

Squashed commit of the following:

commit b633c226809f57bf132d1cbd5bb52a5859e8b622
Author: Michał Podlecki <m.podlecki@op.pl>
Date:   Thu Oct 31 09:29:18 2013 +0100

    upgrade bootstrap to v3.0 and font-awesome to v4.0.3
Merged Michael's users_amount_of_content

Primary author: Michał Podlecki <m.podlecki@op.pl>

Squashed commit of the following:

commit b3704f2f843d1ee225fe4ad6e9ee33cadca0c463
Author: Michał Podlecki <m.podlecki@op.pl>
Date:   Mon Nov 11 11:08:36 2013 +0100

    improve feature test for sorting select element

commit e78acfdcc69f5ea42010ac9f8d849f571220d886
Author: Michał Podlecki <m.podlecki@op.pl>
Date:   Mon Nov 11 10:58:59 2013 +0100

    feature test for sorting users by amount of resources

commit 13ee816b1aefcb2f3c04363588e2b7e72248a6fa
Author: Michał Podlecki <m.podlecki@op.pl>
Date:   Mon Nov 11 10:32:08 2013 +0100

    feature test for default user sorting

commit bf7f1493e3e0932f7e76806d83dc4aae97a6823c
Author: Michał Podlecki <m.podlecki@op.pl>
Date:   Mon Nov 11 10:01:04 2013 +0100

    test feature for user listing

commit d1edc790a36d51333682ada58be40f46f0372556
Author: Michał Podlecki <m.podlecki@op.pl>
Date:   Mon Nov 11 08:25:33 2013 +0100

    enable sorting users list by login and amount of resources

commit 736533a94d0afa92b559d7fecec7c706c4c2742c
Author: Michał Podlecki <m.podlecki@op.pl>
Date:   Thu Nov 7 11:29:00 2013 +0100

    show info about user's amount of resources
Fixed feature test (# of resources in admin users table)
Merged Michael's display_if_people_are_groups

Squashed commit of the following:

commit e96c76942ed2024159ee00c66d3a5b7a2e69b15c
Author: Michał Podlecki <m.podlecki@op.pl>
Date:   Tue Nov 12 11:24:34 2013 +0100

    display if people are groups; ability to filter them