Re-jigged the class implementation to get better support from roxygen2 and CRAN check(). Majority of public functions are documented (remaining are the CRUD functions)

man/DBClient-cash-dbQuery.Rd

@@ -0,0 +1,14 @@
+% Generated by roxygen2: do not edit by hand
+% Please edit documentation in R/DBClient-dbQuery.R
+\name{DBClient$dbQuery}
+\alias{DBClient$dbQuery}
+\title{DBClient$dbQuery}
+\arguments{
+\item{statement}{\if{html}{\out{<character>}} Query to run on the database}
+}
+\value{
+\if{html}{\out{<complex>}} A lazy data table with the results from the query
+}
+\description{
+Runs a query (statement) on a database and returns the results
+}