Squashed commit of the following:

commit 7cd477ba7fb2f960c9e832626546e12ab939b59e
Merge: b6e3d5c 9f93628
Author: Bailey Ling <bling@live.ca>
Date:   Mon Jul 15 20:07:01 2013 +0000

    Merge branch 'solarized-themes-merge' of https://github.com/seletskiy/vim-airline into seletskiy-solarized-themes-merge

commit 9f936281ed072d1bf545f6f80a5f3c2ba544b9c8
Author: Stanislav Seletskiy <s.seletskiy@office.ngs.ru>
Date:   Mon Jul 15 11:57:14 2013 +0700

    get rid of background detection magic

commit 230b16d3c54fec7d17117c6085c9bdc8c1694375
Author: Stanislav Seletskiy <s.seletskiy@office.ngs.ru>
Date:   Sun Jul 14 12:22:30 2013 +0700

    merge solarized and solarized2

    g:airline_solarized_reduced controls how many colors can change between
    mode switching.