Changing `@import` statements and standardizing column and list names.  Also added `download_list` objects.
Re-checked and built.
Removed all plyr commands, changed import statements to importFrom, cleaning code.
- `compile_downloads` removed plyr import.
- `compile_taxa`  removed plyr import, added code block to make it work with `do.call`
- `get_contacts` changed keywords
- `get_dataset` added a `download_list` method.
- `get_datasets` changed keywords, fixed import to importFrom
- `get_download` added importFrom, changed keywords, removed plyr dependency
- `get_site` changed keywords
- `get_sites` changed keywords, changed import to importFrom
- get_table` changed keywords
- get_taxa` changed keywords
- `print.download_list` made it prettier by adding a table of site names.
- rebuilt & re-oxygenized.
Resolved conflict between hub version and laptop.  Accepted all changes from the last commit.

Merge branch 'master' of http://github.com/SimonGoring/neotoma

Conflicts:
	R/get_dataset.R
	R/get_download.R