Remove posting of Scientific Application & Web Developer
Add HTML description of executive director position

[FB 9604](https://nescent.fogbugz.com/default.asp?9604)
Merge branch 'update-employment' into dryad-master

Conflicts:
	dspace/modules/xmlui/src/main/webapp/themes/Mirage/pages/employment.xhtml
Merge branch 'html-exec-dir' into dryad-master

Conflicts:
	dspace/modules/xmlui/src/main/webapp/themes/Mirage/pages/employment.xhtml
Change 'Format' to 'format'