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 = plugin.xml,\
META-INF/,\
html/,\
index/,\
uiqTOC.xml,\
tocConcepts.xml,\
tocReference.xml,\
tocRelease.xml,\
tocStart.xml,\
tocTasks.xml,\
reference/,\
book.css