Added some roxygen files for data objects

Added to provide help files for taxon.table and translate.table.
Merge remote-tracking branch 'upstream/master'
Merge pull request #34 from SimonGoring/master

Added two help files using roxygen for data objects.
Merge pull request #29 from gavinsimpson/master

More fixes inter alia for move to reshape2
Merge remote-tracking branch 'upstream/master' into noplyr