Update fr, pl translations
Shorten introductive text in events page for translations
Add "About bitcoin.org" page
Explain bitcoin.org and Bitcoin ownership
Serve a basic idea of the goals of bitcoin.org
Give required instructions in order to help with bitcoin.org
Merge pull request #212 from bitcoin/about

Add "About bitcoin.org" page
Add a line break between hardware wallets
Hardcode icons width and height in CSS
Make a subtle clarification in the text about volatility
Make some subtle clarifications in the text about instant transactions
Fix a typo
Improve text about reversible instant transactions and move it on "You need to know"
Merge pull request #213 from bitcoin/instanttxt

Improve text about reversible instant transactions and move it on "You need to know"
Allow recursive keys as category in translate.rb
Simplify translations and layout for the "vocabulary" page
Update vocabulary anchor urls in translations
Clean language specific CSS code
Remove Bitcoin london conference
Use Multibit as the default suggested desktop wallet
Rename Multibit to MultiBit
Add Turkish (tr) translation (thanks Deniz Ulker)
Merge pull request #208 from bitcoin/tr

Add Turkish (tr) translation