modify helpText to fieldHelp
workarround for multiple select.
added demo page for multiple select
optimized code for select.html
Merge branch 'master' of https://github.com/benliu723/FromlyAngularStrap

Conflicts:
	demo/views/custom-field-buttongroup-multiple-selection.html
	demo/views/custom-field-buttongroup-single-selection.html
	demo/views/custom-field-checkbox.html
	demo/views/custom-field-radio.html
	demo/views/custom-field-select.html
	demo/views/custom-field-text.html
	demo/views/custom-field.js
	demo/views/custom-template.html
	demo/views/field-helper.html