Access data from a postgres db rather than the example glom file.

Access data from a postgres db rather than the example glom file.

* .settings/com.google.gwt.eclipse.core.prefs: Change GWT setting to
compile down to obfuscated javascript.
* pom.xml: Add c3p0 and postgres JDBC libraries.
* src/main/java/org/glom/web/server/LibGlomServiceImpl.java: Return data
using a postgres db accessed through the c3p0 connection pooling library.