adding uglified client JS to gulp file

[nucleardreamer]

and also switching from rimraf to del

[alexburner]

@nucleardreamer app.js still works fine, but app.min.js is throwing an injector error on my machine

Uncaught Error: [$injector:modulerr] Failed to instantiate module wikitree due to:
Error: [$injector:unpr] Unknown provider: e
http://errors.angularjs.org/1.3.15/$injector/unpr?p0=e
    at https://localhost:2222/lib/angular/angular.js:63:12
    at https://localhost:2222/lib/angular/angular.js:4015:19
    at getService (https://localhost:2222/lib/angular/angular.js:4162:39)
    at Object.invoke (https://localhost:2222/lib/angular/angular.js:4194:13)
    at runInvokeQueue (https://localhost:2222/lib/angular/angular.js:4109:35)
    at https://localhost:2222/lib/angular/angular.js:4118:11
    at forEach (https://localhost:2222/lib/angular/angular.js:323:20)
    at loadModules (https://localhost:2222/lib/angular/angular.js:4099:5)
    at createInjector (https://localhost:2222/lib/angular/angular.js:4025:11)
    at doBootstrap (https://localhost:2222/lib/angular/angular.js:1452:20)

I went back through the angular files and they all seem to be using the proper ['dependency', function (dependency) {}] pattern, so I'm not sure what's going on...

[nucleardreamer]

resolved in #13