Update Rd files to Roxygen2 4.0.0
Change package DESCRIPTION
Rename weights to sppweights
Add explicit library load to options

Also create new debug variable in .options environment
Replace futile.logger with normal messages
Fic weights() in vignette
weights -> sppweights in method definition
Docs for sppweights
Newline
Update docs
Remove @docType tags
Weights to sppweights
Update docs
Update version numbering and license
Re-arrange imports
Re-arrange NAMESPACE
Add reshape2::
Add plyr::
Add ggplot2 declarations
Add library calls to vignette