Changed the target war filename to 'de.war'.
Updated About to include extra build info in dev.

Updated the AboutApplicationServlet to include additional information from the MANIFEST.MF file in its JSON response (originally removed in commit 7be88b6e70d31d8c98d86fbd7532f2eeef043caa).
Updated AboutApplicationData to include this extra info.
Refactored the AboutApplicationWindow's contents from a string template into AboutApplicationAppearance interfaces: an AboutApplicationDefaultAppearance for production and an AboutApplicationDevAppearance for dev environments.
Removed the explicit module name from the gwt compile section in the pom.xml, so that it can be specified by Jenkins or from the command-line (with -Dgwt.module=org.iplantc.de.discoveryenvironment or -Dgwt.module=org.iplantc.de.discoveryenvironmentDev).