dartdoc-viewer: support 80-col code, remove a bunch of unused styles

BUG= https://code.google.com/p/dart/issues/detail?id=17787
R=alanknight@google.com

Review URL: https://codereview.chromium.org//215033006
dartdoc-viewer: eliminate an error when analytics is not enabled

R=alanknight@google.com

Review URL: https://codereview.chromium.org//215213004
Fix search to avoid using 'event.path'. (This was only failing in Dartium)

R=alanknight@google.com

Review URL: https://codereview.chromium.org//222743003
Migrate dartdoc-viewer to the latest pre-release of polymer

R=alanknight@google.com

Review URL: https://codereview.chromium.org//216173008
Upgrade dartdoc_viewer to polymer 0.10.0-pre.8

R=alanknight@google.com

Review URL: https://codereview.chromium.org//231593002
docgen-viewer: removed crashing code, fixed static warnings, other cleanup

Removing broken annotation logic for parameters - Issue 18133

R=alanknight@google.com

Review URL: https://codereview.chromium.org//232063003
Updating project to run on Dart 1.4

This requires updating barback dependency to 0.13.0, following steps from https://groups.google.com/a/dartlang.org/forum/#!topic/misc/579fz2SRnLA to maintain compatibility with Dart 1.3.
Merge pull request #27 from blois/barback_0.13.0

Updating project to run on Dart 1.4
Merge remote-tracking branch 'upstream/master' into angular-skin