Fixes for Internet Explorer 8 compatibility.
dojo 1.9 / 1.10 officially supports IE 8 and higher. IE 8 will not be
supported in dojo 2.0. There are only minor changes required to support
IE8 in CMV so why not do so until dojo 2.0 is available and used by
ESRI.

index.html:
- added conditional es5-shim required by Proj4JS lib with IE8.
- needed for StreetView and MapInfo widgets

Find/Identify/Editor widgets:
- keyword 'class' requires single quotes in data-dojo-props in IE8. This
is a good idea for all browsers.
Merge pull request #241 from cmv/fix/works-with-ie8

Fixes for Internet Explorer 8 compatibility.