RC 0.5.2 (#450)

* Remove link which is timing out

* Increment version number to 0.5.2

* CRAN-SUBMISSION

* Delete CRAN-SUBMISSION

Merge pull request #417 from DavisVaughan/rc/0.5.1

RC 0.5.1

Merge pull request #398 from DavisVaughan/rc/0.5.0

RC 0.5.0

Increment version number to 0.4.7

Merge pull request #333 from DavisVaughan/rc/0-4-6

RC 0.4.6

Document 0.4.5 patch release done by CRAN

Redocument

Increment version number to 0.4.3

Increment version number to 0.4.2

Increment version number to 0.4.1