Mothur update to 1.33: fixes for tool_data_table_conf.xml.sample & tool_dependencies.xml

Fixes for two issues:

1) `tool_data_table_conf.xml.sample` should be in top level of Mothur toolsuite - I committed it to the `tools/mothur` subdirectory by accident in my previous pull request (sorry).

2) `tool_dependencies.xml` should start with `<?xml...` (not `<?eml...`). (This may or may not be important.)