made gbifissues dataset an object within the package in zzz.r
internally calling gbifissues itself, but for documentation/examples calling a new tiny fxn gbif_issues
bumped date
updated cran-comments file
updated makefile for new vignette on issue cleaning, #132
added isocodes to globals to make check happy
reworked vignettes, with issues vign now, closes #132
fxied encoding in vignette
bumped  ver to 0.7.7