Change java-libglom dependency from compile to provided in pom.xml.

Change java-libglom dependency from compile to provided in pom.xml.

Since java-libglom uses jni it can only be loaded once and therefore
must be placed in $CATALINA_HOME/lib and not included in each war.
This directory is defined as /usr/share/tomcat6/lib/ on Ubuntu 10.04.
More information about this issue can be found in the Tomcat 6 release
notes in the "JNI Based Applications" section:

http://tomcat.apache.org/tomcat-6.0-doc/RELEASE-NOTES.txt

* README: Remove note about this issue. Deployment info should really
be on the wiki anyway so I'll add it right now.
* pom.xml: Change java-libglom dependency from compile to provided so
that it's copied in to the packaged war.