configure: Silence npm stderr output

When checking for the optimist package, we weren't piping the standard
error to /dev/null, so we were getting some useful fluff spat out on the
console:

    checking for optimist package... npm WARN package.json walk@2.2.1 No repository field.
    npm WARN package.json github-url-from-git@1.1.1 No repository field.
    npm WARN package.json assert-plus@0.1.2 No repository field.
    npm WARN package.json ctype@0.5.2 No repository field.
    npm ERR! missing: grunt@*, required by undefined@undefined
    npm ERR! extraneous: readable-stream@1.0.17 /usr/local/lib/node_modules/npm/node_modules/sha/node_modules/readable-stream
    npm ERR! extraneous: github-url-from-git@1.1.1 /usr/local/lib/node_modules/npm/node_modules/github-url-from-git
    npm ERR! not ok code 0
    yes
tools/sloccount: Re-indent for 2 spaces

See:
http://google-styleguide.googlecode.com/svn/trunk/shell.xml#Indentation
tools/sloccount: Strip www/ sources

Don't print sloccounts for the www/ sources. So:

    Build system: 1600
    793  configure.ac  (49.56%)
    634  Makefile.am   (39.62%)
    173  autogen.sh    (10.81%)

    Page sources: 10083
    7631  Less CSS    (75.68%)
    2368  HTML        (23.49%)
    84    JavaScript  (0.83%)

    Controller sources: 1938
    1674  PHP (lib)    (86.38%)
    264   PHP (pages)  (13.62%)

    External libraries: 14151
    14151  PHP (twig)  (100.00%)

    Documentation: 3849
    2973  Markdown  (77.24%)
    876   LaTeX     (22.76%)

    Tools: 6773
    3848  Ruby        (56.81%)
    1516  JavaScript  (22.38%)
    921   Python      (13.60%)
    488   Shell       (7.21%)

    Total physical source lines of code: 38394

becomes:

    Build system: 1600
    793  configure.ac  (49.56%)
    634  Makefile.am   (39.62%)
    173  autogen.sh    (10.81%)

    Documentation: 3849
    2973  Markdown  (77.24%)
    876   LaTeX     (22.76%)

    Tools: 6728
    3848  Ruby        (57.19%)
    1516  JavaScript  (22.53%)
    921   Python      (13.69%)
    443   Shell       (6.58%)

    Total physical source lines of code: 12177
tools/sloccount: 0.2.0 update

This adds sloccounts for the new Clojure sources and resources. Example:

    Resources: 7777
    7639  Less CSS    (98.23%)
    138   JavaScript  (1.77%)

    Sources: 1084
    1066  Clojure          (98.34%)
    18    Clojure (tests)  (1.66%)
tools/sloccount: Vertically align output

Force vertical alignment of the numerical values:

    Build system: 1600
       793  configure.ac       (49.56%)
       634  Makefile.am        (39.62%)
       173  autogen.sh         (10.81%)

    Resources: 7777
      7639  Less CSS           (98.23%)
       138  JavaScript         (1.77%)

    Sources: 1084
      1066  Clojure            (98.34%)
        18  Clojure (tests)    (1.66%)

    Documentation: 3849
      2973  Markdown           (77.24%)
       876  LaTeX              (22.76%)

    Tools: 6758
      3848  Ruby               (56.94%)
      1516  JavaScript         (22.43%)
       921  Python             (13.63%)
       473  Shell              (7.00%)