fixed danialfarid#326 danialfarid#331 danialfarid#320

fixed danialfarid#298

Merge branch 'master' of https://github.com/danialfarid/angular-file-…

…upload

fixed danialfarid#284

fixed danialfarid#281

fixed danialfarid#276 danialfarid#277

Merge branch 'master' of https://github.com/danialfarid/angular-file-…

…upload

fixed CORS and some CSS issues

Fixed danialfarid#264

added description for ng-file-drag-over-class