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.
bin.includes = plugin.xml,\
META-INF/,\
trk/,\
icons/,\
os/win32/x86/GetTRKVersion.dll,\
plugin.properties,\
lib/commons-codec-1.3.jar,\
lib/commons-httpclient-3.1.jar,\
lib/commons-logging-1.1.jar,\
trksupport.jar
jars.compiler.order = trksupport.jar
source.trksupport.jar = src/
output.trksupport.jar = bin/