Added a SourceTracker tutorial rst file and image related to that tutorial
Merge branch 'master' of github.com:qiime/qiime into sourcetracker_tutorial
Removed example output from help command in order to avoid confilicts with changes to the option list in future releases.
added text to clarify the description of the filter_otus_from_otu_table.py
Improved the description of adding columns to the mapping file.
made a few minor changes to clarify descriptions and fix grammer.
Now requires minimum version of R instead of exact match, see issue #624
added the print_qiime_config.py command to the tutorial.
Merge branch 'master' of github.com:qiime/qiime
Merge branch 'sourcetracker_tutorial' of git://github.com/johnchase/qiime into st-tutorial
renamed tutorial to be less method-specific in case we have other source tracking methods in the future
added mechanism for qiime to know about sourcetracker
changed mechanism by which QIIME knows about SoruceTracker
started on some edits to the @johnchase's tutorial
Change -o option type for cluster_quality.py

new_path -> new_filepath
added function write small test data set files to output_dir

This function is convenient for interactive testing. If you need
some test files to work with, you can just run:

python -c "from qiime.test import write_test_data; write_test_data('.')"
Merge pull request #890 from gregcaporaso/get-test-data

added function write small test data set files to output_dir
Merge pull request #882 from ElDeveloper/cluster_quality_option

Change -o option type for cluster_quality.py
updated to officially replace per_library_stats.py with print_biom_table_summary.py

fixes #592
removing script documentation