Added checks for required libraries
1) vertexSD and anatSD where changed to vertexSd and anatSd to be consistent with mincSd
2) The CIVET test data was renamed to have the prefix TEST and the corresponding test files were updated
3) The documentation is undergoing  a large update. Every function in the test bed was  given a Roxygen2 style
makeover.
Generated some new man pages with roxygenise.As well as fixed tests
to reflect change to the vertex/anatSd function.
Minor Edits to Comments
Stop when there is a nan,na or inf in mincWriteVolume
Small Fixes in roxygen comments
Added error message when calling mincWriteVolume with na/nan/inf