ENH: launch-scan demo minor tweak to doc and display
ENH: horizMirror (left-right flip) option to BufferImageStim
ENH: mirror options for visual.TextStim

horizMirror, vertMirrow will flip the display of the text
position on screen in NOT mirrored, just the text
limitations: works for me but might not for all gfx cards, etc
DOC: BufferImageStim explanation
DOC: BufferImageStim saves init time to log
ENH: mirror text: coder demo, builder text component option

useful for fMRI, some mental rotation tasks, etc
the builder component dialog is looking a bit crowded
Merge pull request #249 from jeremygray/master

left-right mirror for TextStim and BufferImageStim