changing presentation order on employment

... done to parallel other sections
modifying HTML in cv_detail template
modifying HTML in cv_detail.html
Moved project fields to cvproject (#122)
Merge branch 'master' of github.com:cccs-web/core
Temporary change RICHTEXT_WIDGET_CLASS to PlainText (was PageDownWidget) to work around mezzanine_pagedown 0.8 bug.
Put pagedown back to version 0.7 to avoid update problems for now
Merge branch 'master' into css