Create nilearn_data as a working dir for _get_dataset_dir
Change logic for searching dataset dir
Catching all exceptions and reporting at the end
Test clause on non-directories
change work inside temporary directory in get dataset dir test
Regexp control on raised errors
Different environment setup testing
_get_dataset_dir error message string
Merge pull request #262 from Titan-C/fetch_haxby

Dataset download fails in a fresh install