Improves local video processing.

Improves local video processing, organizes processes and creates new CONFIG options:

OPPS_MULTIMEDIAS_LOCAL_TEMP_DIR - Used to set tmp dir used on the video processing
OPPS_MULTIMEDIAS_LOCAL_FORMATS - Defines ffmpeg commands and formats to be processed
Fix migration to opps pattern.
Update app version.
Change video encoding configs.
Improves video embed template and MediaHost model.
Fix problem on create MediaHost object.
Fix exception.
Hot fix for getattribute problem
Improve video encode config.
Improve encode video config.
Changes system call to subprocess.
Adds command to encode videos.
Increases upload_media task time.
Adds new feature to manage proccess queue.
Updates celery task to prevent SENDING state on local videos.
...
Fixes api and task.
Sets to False video status if has error on processing.
Improves tasks of local videos proccessing and adds 2 settings.
Merge branch 'feature-mp4video'

Conflicts:
	opps/multimedias/conf.py