git-svn-id: https://bucket.mit.edu/svn/nilm/nilmdb@10738 ddd99763-3ecb-0310-9145-efcb8ce7c51f

More work with nilmdb.stream_insert.  Checks for overlap between
parser output and database intervals, and actually inserts the
data into pytables.  Need to benchmark/figure out whether we can
use table.append rather than the row.append() nonsense -- it could
simplify things quite a bit.

Improve layout class and add tests to get more coverage.  Better
error handling on invalid inputs (reports the reason for the error)

Replace layout.fillrow with layout.filltable, but turns out that we
can probably just remove it anyway.

Add nilmdb.Timer for simple timing tests

Move some duplicated test suite helper functions into a new file,
test_helper.py

Add class to test_interval.py to match the others


git-svn-id: https://bucket.mit.edu/svn/nilm/nilmdb@10661 ddd99763-3ecb-0310-9145-efcb8ce7c51f

tolerance in equality comparisions, but it's a real pain to get all
the edge cases right, and it's not clear we actually need that
functionality at the moment.  Skip it for now.


git-svn-id: https://bucket.mit.edu/svn/nilm/nilmdb@10659 ddd99763-3ecb-0310-9145-efcb8ce7c51f

git-svn-id: https://bucket.mit.edu/svn/nilm/nilmdb@10657 ddd99763-3ecb-0310-9145-efcb8ce7c51f

git-svn-id: https://bucket.mit.edu/svn/nilm/nilmdb@10656 ddd99763-3ecb-0310-9145-efcb8ce7c51f