add-visibility-map-information-to-pg_freespace (patch 1 of 2)

'git apply --summary --stat --apply --verbose' output was:

 contrib/pg_freespacemap/Makefile                   |    2 -
 .../pg_freespacemap/pg_freespacemap--1.0--1.1.sql  |   21 ++++++++++
 contrib/pg_freespacemap/pg_freespacemap--1.0.sql   |   25 ------------
 contrib/pg_freespacemap/pg_freespacemap--1.1.sql   |   41 ++++++++++++++++++++
 contrib/pg_freespacemap/pg_freespacemap.c          |   32 +++++++++++++++-
 contrib/pg_freespacemap/pg_freespacemap.control    |    4 +-
 6 files changed, 95 insertions(+), 30 deletions(-)
 create mode 100644 contrib/pg_freespacemap/pg_freespacemap--1.0--1.1.sql
 delete mode 100644 contrib/pg_freespacemap/pg_freespacemap--1.0.sql
 create mode 100644 contrib/pg_freespacemap/pg_freespacemap--1.1.sql

For original context, see http://www.postgresql.org/message-id/20130709.195555.232199346.horiguchi.kyotaro@lab.ntt.co.jp
add-visibility-map-information-to-pg_freespace (patch 2 of 2)

'git apply --summary --stat --apply --verbose' output was:

 contrib/pgstattuple/Makefile                  |    2 -
 contrib/pgstattuple/expected/pgstattuple.out  |   12 +++--
 contrib/pgstattuple/pgstattuple--1.0--1.1.sql |   11 -----
 contrib/pgstattuple/pgstattuple--1.0--1.2.sql |   41 ++++++++++++++++++
 contrib/pgstattuple/pgstattuple--1.1--1.2.sql |   34 +++++++++++++++
 contrib/pgstattuple/pgstattuple--1.1.sql      |   58 -------------------------
 contrib/pgstattuple/pgstattuple--1.2.sql      |   58 +++++++++++++++++++++++++
 contrib/pgstattuple/pgstattuple.c             |   29 ++++++++++++-
 contrib/pgstattuple/pgstattuple.control       |    2 -
 9 files changed, 168 insertions(+), 79 deletions(-)
 delete mode 100644 contrib/pgstattuple/pgstattuple--1.0--1.1.sql
 create mode 100644 contrib/pgstattuple/pgstattuple--1.0--1.2.sql
 create mode 100644 contrib/pgstattuple/pgstattuple--1.1--1.2.sql
 delete mode 100644 contrib/pgstattuple/pgstattuple--1.1.sql
 create mode 100644 contrib/pgstattuple/pgstattuple--1.2.sql

For original context, see http://www.postgresql.org/message-id/20130709.195555.232199346.horiguchi.kyotaro@lab.ntt.co.jp
Adding travis.yml