[preferences] Configurable set of content types for popup (fix #5)
[request-info] Add new content types
[popup] Fix wildcard type treatment
Update policeman.properties

Update German local to include the new strings for the new request types. Add the missing "r" to the string I meant to add it to last time. Replace translation for styles to match with the source that says stylesheets.

Please notify if I missed anything that has been added, that is not yet translated.
[l10n] German names and descriptions for rulesets
Create README.md
(close #32)
Bump version to 0.12
Set FF maxVersion to 36.*
close #33