Squashed commit of the following:

commit 1df4d4a9e047f70f284183185d81070e49097ad3
Author: Daniel Hammann <github@honnel.de>
Date:   Wed Mar 12 21:33:13 2014 +0100

    Added Windows section to CheckStyle configuration information part (and splitted Linux and MacOSX up).
Merge branch 'master' of https://github.com/openpgp-keychain/openpgp-keychain
#429 4)
In the clicking for a particular contact , two icon in the actionbar show the same hint ('Share'). Second
icon hint can be 'Keyserver' or just only 'server'
Merge pull request #431 from honnel/ui-modification

Ui modification