Fix the bug submission script.

Need to keep bug-assist.js around to be able to mark text and submit it
to bug tracker.
Merge pull request #19 from silviapfeiffer/cssfix

Fix the bug submission script.
Fix a spelling mistake and some non-US English
Merge pull request #20 from foolip/us-english

Fix a spelling mistake and some non-US English
Add missing </li> on "WebVTT percentage value" def
Unify percentage syntax and parsing.

Fixes https://www.w3.org/Bugs/Public/show_bug.cgi?id=19836

Introducing double percentage values for "line", "size" and "position"
cue settings.

In the syntax section: use "WebVTT percentage value" syntax for the
percentages in "line", "size" and "position" cue settings.

In the parsing section: us "parse a percentage string" algo for the
percentages in "line", "size" and "position" cue settings.

Update VTTCue DOM API with double values for "line", "size", and
"position" percentage values.
Merge pull request #18 from silviapfeiffer/percentage-syntax

Unify percentage syntax and parsing.