[refactor][xs]: move scripts to scripts dir and change markdown extension.
[README][s]: add in full readme from datahub.
[scripts][xs]: minor refactoring (some of it old).
[scripts][s]: bundesbank have changed their download url (10m to relocate!).

* Also disable upload to datahub for time being.
[data][s]: add in most recent data (since May 2012).