added back a fxn occ2df for coercion to single data.frame, fixed shiny demo
bumped version number
fixed errors, passing check now, updated readme
added more maprcharts docs, added save option and associated path param
added a print and plot method for a summary of result of occ call, and plot method for a base plot of occurrences
added footer to readme, fixed broken docs for print and plot methods, removed files from install_github from travis file now on cran
Updated imports
Added ggplot skeleton
Fixed DESC conflict
Cleaning up formatting, especially assignment operators and style.