Simpler version of getEurostatRaw

Now just download and turn to data.frame.
Change name to get_eurostat_raw
modifies get_eurostat to use get_eurostat_raw
Delete old gerEurostatRaw
Deletes author fields
Update NAMESPACE and documentation
Fix links in documentation
renamed getEurostatRaw refs from TOC
build ok
Merge branch 'master' of https://github.com/ropengov/eurostat