Machinecoin: Added demo keystore credentials
Related to https://github.com/Gitju/bitcoin-wallet/issues/1
Will be removed later.
Lets me build the whole project on a fresh system a lot faster as because I just have to setup a keystore under ~/.machinecoinkeystore/keystore.jks with IntelliJ IDEA 13 and therefore I use "android" and "androidpassword" as credentials.
The appstore app has to be build with a real and unique one.