When scanning system drives for installed SDKs, default SDK version to 5.0 when no SDK version info is available; also updated SDK properties dialog to correctly display SDK version string.

bin.includes = META-INF/,\
               os/,\
               tcfPlugin.jar
jars.compiler.order = tcfPlugin.jar
source.tcfPlugin.jar = src/
output.tcfPlugin.jar = bin/