First shot at AddMetadata command.

This will not work...
Added barebones interface
Merge pull request #154 from jrrideout/qcli

Added initial cut at add_metadata.py pyqi command
first working version of print_biom_table_summary Command object
fixed a few dumb issues
Add first implementation of add-metadata cli
Reorganize pyqi stuff
Merge pull request #156 from jrrideout/death-march

Death march
Merge branch 'death-march' of github.com:biom-format/biom-format into death-march
losing it
Merge pull request #157 from jrrideout/death-march

losing it
Merge branch 'death-march' of github.com:biom-format/biom-format into death-march
add_metadata partially works!
WORKING.... FUNCTIONALITY!!!!
first working verison...
first working version
removed debugging status
Merge pull request #158 from jrrideout/death-march

add_metadata partially works!
Merge branch 'death-march' of github.com:biom-format/biom-format into death-march
stubbed out directory struture for pyqi-based commands