Build script changes to allow packaging and deployment to Maven central
Merge remote-tracking branch 'origin/master' into build_script_maven
Commented out temporary Nexus repository
Build script changes to allow packaging and deployment to Maven central

Updated build.properties to contain the sonatype urls. Updated build.xml so that gpg signing works for each accompanying artifact type. Updated pom.xml to allow templated group and artifact ids.
Markdown version of the README
Merge pull request #41 from davecramer/master

Added constant for turning logging OFF
Merge pull request #42 from davecramer/master

Avoid NPE on user defined types which have a value of null provided by Derrick Hudson
Merge pull request #43 from davecramer/master

fix compile error
Merge pull request #40 from lordnelson/doc_changes

Markdown version of the README file
Support for JDBC4 isWrapperFor & unwrap methods
Added unit test for wrapper functions
Change default password to 'test'

./org/postgresql/test/README says the default password for unit tests is 'test',
but the default was actually 'password'
Merge pull request #44 from fathomdb/support_wrappers

Support for JDBC4 isWrapperFor & unwrap methods
Merge pull request #45 from fathomdb/fix_default_password

Change default password to 'test'
Merge branch 'build_script_maven' of git://github.com/lordnelson/pgjdbc
Merge branch 'master' of github.com:pgjdbc/pgjdbc
fix Exceptions and messages