Issue #80 : validate custom search URL without placeholders, which will make URLs invalid in some cases
Issue #80 : address case where barcode text has a matching escape sequence, and better handle problematic case of URL escape sequences like %f2 matching the %f placeholder
Merge pull request #79 from Petja/master

New UI to webapp
Remove Thumbs.db from gitignore
Increase appspot app version to 10
Disable strangely flaky test for now
Add app.yaml mappings for new static files from issue #79