removed NCBI2R dependency
getfullhierarchyfromtsn returns no factors
tax_names accepts multiple ranks to query
tax_name accepts vectors as input
Merge pull request #118 from EDiLD/dev_tax

improvements of tax_name
tax_name has an option to query both, NCBI and ITIS, in one call and return the union of both
Merge pull request #119 from EDiLD/dev_tax

last fix for  Issue #117
fixed bug in iucn_summary
Merge pull request #120 from EDiLD/fix_quick

fixed bug in iucn_summary
* new extractor function for iucn_summary: iucn_status, to extract status from iucn-objects
fixed tests
Merge pull request #121 from EDiLD/fix_quick

new extractor function for iucn_summary: iucn_status, to extract status from iucn-objects
added data files and fxn to lookup APGIII families and order
fixed error in fxn gethierarchydownfromtsn
use message (for better usage with knitr) instead of cat.
Merge pull request #131 from EDiLD/fix_quick

use message (for better usage with knitr) instead of cat.
cat > message
Merge pull request #132 from EDiLD/fix_quick

cat > message
fixed bug [get_tsn('Riolus')
Error in textConnection(text) : invalid 'text' argument], partial rewind of commit 28bdd2b655d24a3b2aa259b9d7f6b1cd50cdefe3
Merge pull request #138 from EDiLD/fix_quick

fixed bug [get_tsn('Riolus')