Merge pull request #171 from ksurya/ajax-preview

Ajax preview Form Submission
ENH: show upload-image form as text

1. instead of showing upload-image form as field with button,
show as a text attached to the bottom of description
Merge pull request #172 from ksurya/upload-img-btn

Change upload image button design
BUG: replace custom select-file button with default

custom select-file input button (tweaked) unable to show selected file name.
the default input button is restored.