Removed extlib/mysql-connector-java-*-bin.jar from .classpath
Added lib/commons-jexl-2.1.1.jar to .classpath
Allow viewer.external.classpaths in the viewer's plugin.properties to be directories in addition to files
Merge branch 'master' of github.com:azkaban/azkaban2
Added back extlib/mysql-connector-java-5.1.16-bin.jar to .classpath
Merge pull request #59 from Erwa/master

Added lib/commons-jexl-2.1.1.jar to .classpath; allow viewer.external.classpaths to include directories