added code to default to computing the optimal solution after the inner CV to estimate the hyperparameters
added opt shrinkage stuff for whitening computation
Merge branch 'master' of https://github.com/jadref/buffer_bci
updates to evoked Demo to fix bugs found in testing..
return example hdr/events in testing mode
updated readme text
updated plotting functions (AUC and #trials in line labels)
robustified input processing - deal better with key-presses and invalid inputs
robustified input processing -- key presses and invalid inputs
make it error if can't find PTB
force tilde expansion