Support apt.postgresql.org version specific packages.

This change will allow to test beta and release candidate version of
postgres from apt.postgresql.org.

For stable version this change will make available the libpq package
for that specific version (that will not hurts).
Merge pull request #255 from mnencia/patch-6

Support apt.postgresql.org version specific packages.
Fix license file.
Merge pull request #258 from apenney/license

Fix license file.
Prepare 3.0.0 release.
Merge pull request #259 from apenney/300-release

Prepare 3.0.0 release.
Special case for $datadir on Amazon

Closes #252
Merge pull request #262 from bcomnes/amazon

Special case for $datadir on Amazon
fixed the rspec test to include 'sha1' in
Fix documentation about username/password for the postgresql_hash function

This is messed up in different ways and this commit brings it in align with what the function actually does.
FM-103: Add metadata.json to all modules.
Merge pull request #269 from apenney/metadata

FM-103: Add metadata.json to all modules.
Merge pull request #268 from duritong/master

Fix documentation about username/password for the postgresql_hash functi...
Merge pull request #267 from neilnorthrop/master

fixed the rspec test to include 'sha1' in
Prepare 3.0.0-rc2 release.
Merge pull request #272 from apenney/200-rc2-release

Prepare 3.0.0-rc2 release.
Expose owner in db definition
Tests for owner param
Merge pull request #273 from ares/master

Expose owner in db definition
Add a parameter to (un)manage pg_hba.conf