Allow args and kwargs to upload_handler_name

Now can use args and kwargs for reverse url. Example in template:
{% jfu 'core/core_fileuploader.html' 'core_upload' object_id=1 content_type_str='app.model' %}
Change .ready to .load for fix Google Chrome bug

Sometimes i have bug in load upload form:
Uncaught TypeError: Object function (e,t){return new v.fn.init(e,t,n)} has no method 'widget'
jquery.fileupload-fp.js:37Uncaught TypeError: Cannot read property 'fileupload' of undefined
jquery.fileupload-ui.js:38Uncaught TypeError: Cannot read property 'fileupload' of undefined

Uncaught TypeError: Object [object Object] has no method 'fileupload'
Update upload_form.html
Update upload_form.html
Update upload_form.html
Update upload_form.html
Merged branch 'master' of https://github.com/stelzzz/django-jfu
(Pull request #8 [https://github.com/Alem/django-jfu/pull/8]).
Virtual environment executable directory path adjusts for os; Minor usability improvements to demo scripts; Documented user-contributed feature