updated DESCRIPTION file
fixed ebirdnotable test
updated description file formatting
updated pkg leve man file
started updating nearestobs fxn
simplifying functions, replaced RJOSNIO with jsonlite, closes #24
replaced all curlopts param with ...
small changes for man file in ebirdtaxonomy fxn
added base url fxn and reworked url construction to be simpler
all fxns now using helper GET fxn to do request, check response, parse json, and return data.frame, closes #25