print time taken by PCA
remove some unused files
remove unused code from originalpackage
__init__.fast_tsne: don't crash if PCA dimensionality exceeds data
compile with -ggdb
emacs .dir-local.el: try to be specific in tab-munging modes

Because it seems having this mucks up tab-width for other buffers in
other modes.
fasttsne: add option to normalise first