Move 'save changes' buttons to the bottom of the form
Add curation_page_title, administration_page_title, page_title helpers for rendering admin title blocks

Fixes #264
Update metadata pge; fixes #275
Move actions below the page listing
Include AdminTitleHelper in all view specs
Update exhibit contacts pages
Update tags page; fixes #262
Update browse page; fixes #266
Add spotlight/variables and spotlight/variables_bootstrap for holding spotlight variables and overrides
s/instuctions/instructions/g
Apply style fixes from #219