chore(Grunt): add developer index page

Add a bare bones html page to help navigate between the grunt connect servers.
Remove old unneeded 'demoApps' directory in favor of 'tools' which contains
only one file.

Closes #302
Closes #304
chore(README): update readme with dev index information
Merge pull request #307 from ozone-development/dev-index-issue304

chore(Grunt): add developer index page
feat(appToolbar, dashboardToolbar, dashboardView): consolidate full screen mode and change icons

Remove show/hide toolbar button from top toolbar. Button on bottom toolbar toggles full screen mode for the entire application. Update the full screen mode icons.

Closes #306