o remove non-ASCII fancy quotes
 o use Rd macros for code and links
 o make a specific import from OAIHarvester
 o remove trailing white space
 o change \dontrun to \donttest
roxygenise the documentation in light of changes to pg_list_records.R
Change to a specific import in first function.
make pg_getrecord use a specific @importFrom
make pg_list_records use a specific @importFrom
formal argument identifier was named Identifier
\dontrun changed to \donttest
rename pg_getrecord to pg_get_record
rename file containing pg_getrecord
Merge pull request #28 from gavinsimpson/fix-pg-list-records

Fixes to `pg_list_records.R`
Merge pull request #29 from gavinsimpson/fix-download-function-imports

Change to a specific import in first function.
resolved conflict with pg_list_records
Merge branch 'gavinsimpson-fix-namespace-errors'
Merge pull request #31 from gavinsimpson/fixes-to-pg_getrecord

Fixes to pg getrecord
rebuild documentation and NAMESPACE but only included changed files
merged changes from gavins PR #33
Merge branch 'gavinsimpson-rename-pg-getrecord'