Add flashes to scaffolded templates
Update generated templates to use `render` instead of `yield`
Add new `render` method to replace `yield` which is now a reserved keyword
Merge branch 'flashtemplates' of git://github.com/ben-ng/geddy into ben-ng-flashtemplates

Conflicts:
	gen/base/realtime/views/ejs/layouts/application.html.ejs
	gen/base/realtime/views/handlebars/layouts/application.html.hbs
	gen/base/realtime/views/jade/layouts/application.html.jade
	gen/base/realtime/views/mustache/layouts/application.html.hbs
	gen/base/realtime/views/swig/layouts/application.html.swig
	gen/base/views/ejs/layouts/application.html.ejs
	gen/base/views/handlebars/layouts/application.html.hbs
	gen/base/views/jade/layouts/application.html.jade
	gen/base/views/mustache/layouts/application.html.hbs
	gen/base/views/swig/layouts/application.html.swig
Move display methods into view-helper
Moved display stuff out
Export displayFlash
Updated tests to remove display code
Use 'flash' instead of 'flashes'
Use new session flash error handling
Use view helper for displaying flash
Add assert to session flash test
Merge branch 'master' of github.com:mde/geddy