DOC: added @ElDeveloper's text on how to use SO to get help with skbio; fixes #451
DOC: fixed rendering issue
DOC: fixed rendering issue
DOC: removed comment about posting general comments elsewhere, let's not discourage people from positing under this tag for now - we can always add back if it becomes a problem
DOC: incorporated suggestion from @ElDeveloper
Merge pull request #488 from gregcaporaso/issue-451

added "Getting help" section