planning/workflow/bien3_architecture/stage_I.png, stages.png: synced to bien3_architecture.pptx
moved everything into /trunk/ to create the standard svn layout, for use with tools that require this (eg. git-svn). IMPORTANT: do NOT do an `svn up`. instead, re-use your working copy's existing files with `svn switch` (http://svnbook.red-bean.com/en/1.6/svn.ref.svn.c.switch.html).
planning/workflow/bien3_architecture.pptx: stage II: removed Step prefix before stage #, which the other slides don't have
added planning/workflow/bien3_architecture/stages.png
added planning/workflow/bien3_architecture/stage_*.png
