stills: refacture type field in mediamosa table

[MC-arjen]

The introduction of the field "type" in the mediafile table enum(VIDEO, AUDIO, STILL, ...) creates all sorts of problems in relation to system detected tools and migration.

This field needs to be changed to is_still (TRUE/FALSE) to identify the stills from non-stills.

Also the still upload should be possible through the default upload rest call (POST and PUT) with a parameter (type=still).

[forgacs]

Ready. It is on the SVN. Please, test it.

[MC-arjen]

Commited to version 1.7.0(.1)

This change adds a field to the rest output of mediafile details:
<is_still>FALSE</is_still>

Note: we should start a discussion on how to store and present user flagging/system detection of mediafile types. We have:

• <is_still>FALSE</is_still>;
• <type>VIDEO</type>;
• all sorts of mediafile_metadata (container_type, mime_type, video codec, audio_codec);
• we are introducing a mediafile tag for user categorization;
• we support watermarks, stills, transcodings, images (not stills), originals, audio, word documents, etc.

This discussion should take into account the results of TS "andere content".

[Frans]

Should this have been in the release notes of 1.7.0.1 too?