tools bug fix
Merge branch 'master' of https://github.com/perrette/dimarray
README runs through doctest + other minor things (+1 assert in axes)
reorganized the whole project
added global config file
seem to have debug the indexing
fixed the last bugs
summary:
- reorganized the files into core, io, lib, dataset [, examples]
- changed a few names, e.g. read_nc, write_nc