feat(ng-preload-src): API changed

* remove ImgPreloader service
* add $image factory with preload method and use it like $q
* use PreloadCtrl in preloadWithDefaultSrc directive
chore(client): update images list and selectable from dropdown
feat($image): add angular-loading-bar(cfpLoadingBar) support

* http://chieffancypants.github.io/angular-loading-bar/
* use $injector.get or conditionally create null object
* hook preload with cfpLoadingBar start/complete function
chore(subtree): merge tomchentw/tc-ng-boilerplate@ab92164
refactor(ng-preload-src): use let block
chore(publish): v0.0.2 by Makefile