- changed RetrofitClientBuilder to construct a new OkHttpClient intead of Default Apache Http Client
Updated README.md 

 - update to README file
Updated keystore
Changed error message so you see the host besides the exception.
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/development'

Conflicts:
	pinnedcerts/src/main/res/raw/keystore.bks
Using latest retrofit and ok http client
Added custom trust manager. That somehow fixes the certificate problems, even though it doesn't seem to enter the certificate exception handling
Fixed the custom trust manager so it properly uses the given keystore. Also added oauth token header to the github retrofit request, so you can test it for more then 60 times a hour.
Merge pull request #6 from delgurth/master

OkHttpClient & Workaround for certificate pinning on android 2.3