Brought get_download, get_geochron, get_publication, get_site, and get_table up to Google's R Style Guide Standards.
Merged Luke's style changes.  Resolved some conflicts.

Merge branch 'master' of https://github.com/sosalla/neotoma into sosalla-master

Conflicts:
	R/get_download.R
	R/get_site.R
Merge branch 'sosalla-master'
Merge pull request #95 from SimonGoring/master

More style fixes.