Updated build.xml to only compile when files have been changed
Changed fileset for combineJavaScript.combineCesium to be the same as
the fileset provided by createCesiumJs
Removed combineJavaScript.combineWorker changes
Merge pull request #719 from cmorse/buildUpdate

Updated build.xml to only compile when files have been changed
Merge remote-tracking branch 'origin/master' into batching