more toolset definition

[MC-arjen]

Currently the predefined tools are: 'ffmpeg' and 'windows'. In the settings in Mediamosa these toolsets are defined with a executable path.

In order to add more toolsets this needs to be configurable, the path should be stored in the database.

This is the first step in a more easy addition of more toolsets.

[robert]

After more thinking we decided that this is not the start to make this setting work better than current situation.

Better is for per tool drupal module based. Where each Drupal module tool has hooks for listing, creating the execute path, and own tool settings stored into database.

Using this technology we can introduce new modules where new tools can be enabled, for example pdf2txt, transcription and image manipulation.

[forgacs]

We have done with phase 1:
- The mediamosa_tool_params class was introduced with MySQL table {mediamosa_tool_params}. It is the new basic class for the tools.
- Two tool module was developed: mediamosa_tool_ffmpeg and mediamosa_tool_windows with two hooks: hook_mediamosa_tool_iteration() and hook_mediamosa_tool_mapping(). First hook gives back the tool name, and the second gives back the mapping parameters.
- The allowed_values field was redesigned. The separator was ";", and it is a serialized array now.