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
Fix in column names, now the 'time' dimension is properly named

By adding
 colnames(dat3)[length(cnames1) + 1] <- cnames2
the output has proper name for ‘time’ dimension
(cname2 is ‘time’ in most cases)

There is also a small fix in examples, recent version was not working.
Fix for issue #8

Manual conversion of strings into factors.
The undesired side effect of convert = TRUE was that T -> logical TRUE
instead of factor Total

Grouping variables are stored in cnames1 thus conversion into factor
seems safe.