Merge pull request #138 from SimonGoring/master

Working on the issues list, resolving bugs.
Merge pull request #140 from SimonGoring/master

Added more import statements, fixing keywords.
Roxygen code for the download class.
Merge branch 'master' of https://github.com/SimonGoring/neotoma
Merge remote-tracking branch 'upstream/master'
Multiple changes to standardize keywords and imports.
* Changed testthat filename to see if that helps automatically run tests.  It doesn't seem to
* using the `importFrom` tag seems to be causing errors as functions keep importing the same methods.  I need to look into that.