Log Message:
Update to 0.6.2

Upstream changes:
Version 0.6-2

    o   dbGetQuery do not return NULL.
    o   use registration mechanism to call native routines.

Version 0.5-3

    o   Update the libpq library so that the package can be compiled in new \ 
versions of R and macOS.

Version 0.5-2

    o   Support dbBegin() API

version 0.5-1 --2014-02-08

    o   Remove segmentationfault when NULL is passed as host argument.

    o   Conversion routine for raw in R and bytea in PostgreSQL

    o   Use accompanied libpq when either of libpq and header is not found on darwin

Version 0.5 -- 2013-10-12

    o   postgresqlWriteTable: send column names at COPY

    o   System library header search path for OS X 10.9 (Mavericks)

    o   Memory leak was reduced
    o   Close the socket on failure

Version 0.4 -- 2013-03-27

    o   Initial implementation of prepared statement

    o   Use system libpq library when available on OS X (darwin)

    o   Force ISO datestyle for PostgreSQL-R communication by default

    o   Time zone aware Timestamp POSIXct conversion

Version 0.3-3 -- 2012-10-05

    o   Bugfix on dbColumnInfo and others reproducible by gctorture(TRUE)

    o   Do not implicitly make new connections, which interfere with transaction.

    o   Change the notation of the LICENSE