Update tutorial.rst

Minor spelling error - the possessive of 'it' does not have an apostrophe.
Update tutorial.rst

Minor spelling error: "installing" has an ess :-)
Merge pull request #75 from StevenWColby/patch-1

Remove incorrect apostrophe
Merge pull request #76 from StevenWColby/patch-2

Fix typo
Fix typo: Remove wrong linebreak

  ParsingError: Source contains parsing errors: '/home/user/.pypirc'
          [line  3]: 'pypi\n'
Merge pull request #77 from devurandom/patch-1

Fix typo: Remove wrong linebreak
edits to "Package Data" and "Data Files" sections
Merge pull request #78 from qwcode/datafiles

edits to "Package Data" and "Data Files" sections
PEP440 was accepted.  Add link to pip's PEP440 PR.
fix location of hashdist section anchor
add toc breakouts for all of the advanced sections