Added test for IR #276

@cmather -- notice that it fails against master. Good job!
Added failing test for using `{{#with` in layouts
Conflicts:
	layout-test.js
Made the test a little better
For #1

Conflicts:
	layout-test.html
Sensibly set default data for #1
Merge branch 'default-data' into pass-regions-as-arguments

Conflicts:
	layout-test.html
	layout-test.js