add initial support for viewing variants in the sdk config tree. refactor some code which initializes sbsv2 contexts.
some hacks added for re-loading configurations when the default config is a variant.
source.. = src/
output.. = bin/
bin.includes = META-INF/,\
.,\
plugin.xml,\
resources/,\
icons/,\
library.jar,\
hoverHelpContext.xml
source.library.jar = src/