Fixing vignette issues

Some notes/warnings thrown from vignette build of previous version. "It seems that we (Brian Ripley) need(ed) to remind me of the CRAN policy". So it's fixed, I think.

Minor bug fix and dependency removal

ggmap was used previously to geocode the locations in the listLocations function of helminthR. The ability to do this now requires an API key. In order to make the package a bit leaner, I opted to remove this dependency, and use a cached copy of the geocoded data (data(locations)).

I also tweaked the cleanData function, as it was only removing genus level records if the name ended in "sp.", ignoring the ones that ended in "spp.". This is fixed for both host and parasite species now.

fixed bug in location string formation

This update fixes a bug in the formation of location strings that is of importance when specifying locations containing spaces or special characters.

initial CRAN release

The current version has been tweaked to include the ability to search by parasite subgroup in findLocation and findHost functions, and is up to CRAN standards. This release coincides with the initial CRAN package submission (v1.0.5).