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

 - update to README file
Updated keystore
Fixed certificate order of import in the keystore
Merge branch 'master' of github.com:ikust/hello-pinnedcerts

Conflicts:
	pinnedcerts/src/main/res/raw/keystore.bks
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