German translation

Add some missing german translation

Firefox nightly compatibility

Fix #139

minor fix

Fix :
#114 #118 #120
Restrict search result on leaf #119 #115. Thanks to @craftyguy

For mozilla

Just create a release to submit a recent version to the mozilla review process

Code cleanup

Thanks to @sometoby for his great work on code cleanup
There is also now

• a German translation (thanks to @phryneas)
• a Russian translation (thanks to @horosgrisa)

Code & UI improvment from @sometoby

Lots of improvements in the code and in the UI. All coming from @sometoby.

• New icon
• New preferences dialog box
• Huge code cleanup

Many many thanks to him for his works and his involvement.

I also add @tuxor1337 and @phryneas in the install.rdf because they both contribute in PassFF in many ways.