Updates generate_otu_signifigance for clearer doumentation

Fixes documentation errors; updates sanity checks to be more sane;
removes an unnecessary teardown in the testcode
Merge branch 'master' of https://github.com/qiime/American-Gut into bug_fix_generate_sig
Fixes Bugs

Handles cases where no high is generated
Skips over contested taxa in tree walking
Updates test code
Documentation update
Fixes counting order

rows are removed from table starting at the far right
Introduces date and time; removes unnecessary functions

Introduces a date and time description to the macros file
Removes functions which are not used
Updates function name for accuracy
removes unnecessary lines, updates code
Merge pull request #66 from JWDebelius/bug_fix_generate_sig

Bug fix generate sig
Merge branch 'master' of https://github.com/qiime/American-Gut into OralandSkinPlotFixes

Conflicts:
	americangut/generate_otu_signifigance_tables.py
	scripts/generate_otu_signifigance_tables_AGP.py
	tests/test_generate_otu_signifigance.py
	tests/test_make_phyla_plots_AGP.py
Fixed a spacing problem