Getting started with base uploader

- Parsing parameters
- getting access to output imagestore object
Convert the metadata error to warning
Introspect image and insert image metadata record
Adding the record to session
Merge branch 'dev/dj-ptif-upload-base'

* dev/dj-ptif-upload-base:
  Adding the record to session
  Introspect image and insert image metadata record
  Convert the metadata error to warning
  Getting started with base uploader