[TASK] Change to fully qualified namespace

ext_tables is using an alias for namespace.

This patch changes this to a full qualified namespace identifier
[TASK] Slider: TCA for show_timerbar should be string

This patch changes the indexes for the items in the sliders show_timerbar to strings
[TASK] Slider: Add model

The slider has no model yet

This patch adds the Slider model
[TASK] Option: Add model abstract

Some models will use key value variables

This patch adds a model abstract for this
[TASK] Easing: Add model

The easing has no model yet

This patch adds the Easing model
[TASK] Font: Add model

The fonts have no model yet

This patch adds the Font model
[TASK] KenBurns: Add model

The Ken Burns transitions have no model yet

This patch adds the KenBurns model
[TASK] Position: Add model

The positions have no model yet

This patch adds the Position model
[TASK] Style: Add model

The styles have no model yet

This patch adds the Style model
[TASK] Animations: Add models

The animations have no models yet.

This patch adds the AnimationIn and AnimationOut models