Added a few tests (default API home, taxa)
See #13
Re. #10 -- removed the VignetteBuilder line

I'll add a makefile to build the vignettes later, or better,
try to find out why it fails to build.
Better handling of authentication

Use of $me instead of whoAmI will decrease the overall number of
requests being made when uploading data to the DB.
Added auto_unbox to toJSON

Now I'll have to make sure that any item with (possibly) more than one
element is passed as a list, and not as an array. This pisses me off to
no end. Seriously.
Making use of stringr
Bug in patchTaxa
Upload is fixed
Merge pull request #16 from mangal-wg/rjson

Things related to JSON
Fix for the first problem in #17
Remove NULL fields before patching (#17)

Note that this also requires to remove fields that are not null, but
have a length of 0. Anyway, I was able to patch using this method.
News
Merge pull request #18 from mangal-wg/dev

Bring back changes from dev into master, including a bump from 0.3.0 to 0.3.1