Support for Time type on Postgres 9.3

[brbza]

Hi! I found an issue when importing Time type on Postgres 9.3. COPY command was always complaining of missing data on the Time column, after analyzing a COPY .. TO output of a Time column I realized that this columns is represented as 8 bytes and not as 4 bytes as currently in the code.

I've forked the repo and made a commit with the change (that now is working fine for me), if you think it is valid you can merge with your repo.

Just wondering on which version of Postgres have you tested the Time type import, can you please let me know for reference?

lib/pg_data_encoder/encode_for_copy.rb:174
was

        buf = [(field.to_f * 1_000_000 - POSTGRES_EPOCH_TIME).to_i].pack("L!>")

now

        buf = [(field.to_f * 1_000_000 - POSTGRES_EPOCH_TIME).to_i].pack("Q!>")

Regards,

Carlos