Timestamp support added. Timezone is handled in wreid manner, following
commits contain facilities to get timezone from libpq.
PQparameterStatus is added to connection wrapper
Now able to check timestamp format at runtime
Now can get info about server time zone. That is needed for timestamp
with time zone conversion.
Docs for pool. Found small bug in execQuery - always falls into
getTransaction emergency blocking part.
Resolves issue #23. Time zone information is acquired from connection
parameters.
PGAbsTime and PGInterval now serializes time in iso ext string rather
then unix time.
Merge pull request #31 from DSoftOut/issue#23

Issue#23