Update text/courses/data-cleaning.rst
fix links
Update text/courses/data-cleaning-nuts-and-gum.rst
added data-cleaning to courses overview...
Update text/courses/data-cleaning-invisible-man-in-spreadsheets.rst
Update text/courses/data-cleaning-invisible-man-in-spreadsheets.rst
Update text/courses/data-cleaning-invisible-man-in-spreadsheets.rst
fixed a link in the inivsible man
Update text/courses/data-cleaning-witchs-brew.rst
Update text/recipes/cleaning-data-with-spreadsheets.rst
Merge pull request #64 from emmaprest/patch-14

Update text/recipes/cleaning-data-with-spreadsheets.rst
Merge branch 'patch-13' of https://github.com/emmaprest/datawrangling
Merge branch 'patch-12' of https://github.com/emmaprest/datawrangling closes #62
Merge branch 'patch-11' of https://github.com/emmaprest/datawrangling closes #61
Merge branch 'patch-10' of https://github.com/emmaprest/datawrangling closes #60
closes #59 Merge branch 'patch-9' of https://github.com/emmaprest/datawrangling

Conflicts:
	text/courses/data-cleaning.rst
fixed links
add recipe to index
added recipe on using nomenklatura