Survey editing/taking Javascript and CSS fixes. This patch adds some cosmetic changes and functional fixes: - UI now removes all of the field content when a field is deleted, - CSS tweaks, and jQuery hack to specialize comment CSS, - fixed JS path in take.html. Reviewed by: Pawel Solyga (with some small changes)

# use glob syntax.
syntax: glob

*.pyc
*.zip
*~
.project
.pydevproject
app.yaml
build
tests/coverageResults
*,cover
tests/.coverage
*.git
.gitignore
.DS_Store
.settings