working on normalization
Normalize method seems to work pretty well now.
Collections are now automatically normalized on both read and write.  Tests updated.
Work in progress
Fixing things up
Unit tests for arvados.locators_and_ranges
Added readfrom()
Tests pass
Working on arv-ls
implemented arv-ls to replace whls
added -s option
Added arv-normalize
Added arv keep normalized
Put some code into collection model to do normalization but I don't think that is the right place for it.
Do a partial normalization of file list before sending to client.
Fixed file page to sort by stream name, then by file name
Work in progress arv-mount based on llfuse and supporting directories listings.
Directory browsing works, working on error handling for file reading.
Working on fuse mount
Fuse driver works for mounting collections and reading files.  Tested with jlake collection, spot checked m5dsum values of several files which matched the md5sum catalog in the jlake collection.