add Eurostat local example file
added Roxygen Documentation to readSDMX
Make project aware or Roxygen
rewrite man of readSDMX with roxygen
Update README.md
Update README.md
undo roxygen comments for readSDMX
corrected example
delete doi that will be updated
Update README.md
add xml header, fix Typos
add test for Eurostat example
Merge pull request #14 from Tungurahua/roxy_readSDMX

Test Eurostat Example
remove import (XML imported at package level)
master #15 1st move to support SDMX 2.1 testin with Eurostat data