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 = plugin.xml,\
META-INF/,\
.,\
html/,\
index/,\
icons/,\
book.css
src.includes = META-INF/,\
html/,\
icons/,\
plugin.xml,\
book.css