Split summarize_taxa_through_plots.py workflow up.

Still need to add compare_taxa_summaries.py and plot_taxa_summary.py steps.
Merge branch 'master' into issue_82

Conflicts:
	my_microbes/util.py
	scripts/personal_results.py
modified text to address issue #70

after thinking about this more, will only cover observed species here as it is intuitively the most simple way to think about alpha diversity.
added text to address #70

the unit test is failing now due to different text, and don't have time to fix it if i'm going to get through a few more issues. should we change that unit test to an ``assertTrue(result.startswith('...')). These tests that rely on text get hard to work with.
added text for top-level index page

this addresses issue #78. see the ``top_level_index_text`` varaiable. I wasn't sure where it made sense to hook it up.
Added comparison of taxa summaries.

Code still needs to be cleaned up (it's pretty hackish right now).
Merge branch 'master' into issue_82
Split taxa summary code out into its own function.
Merge branch 'master' into issue_82
Merge branch 'master' into issue-70

Conflicts:
	my_microbes/format.py
several fixes to text

 - some clarity issues (thanks @jrrideout!)
 - made email address a mailto link
 - added link to NAU144 data
Merge pull request #93 from gregcaporaso/issue-70

Issue 70
Merge pull request #96 from jrrideout/issue_82

Taxa summaries are now made compatible before creating plots.