Docs/logo update (#81)

* Fixes for vuln calculation and deprecations.

* Clarified confusion between model identity (UUID) versus model name for database operations. store uses UUID for replacement, load by name fetches the first match. Creating FairModel('New Name') generates a new UUID and thus a new, distinct model.

* Added 'Secondary Loss Event Frequency' to the self._le_1_targets list in FairDataInput.__init__. This will ensure that any parameters supplied for SLEF (e.g., low, mode, high, constant, mean) are checked to be within [0, 1]. It also ensures that the generated values for SLEF are clipped to [0, 1].

* Fixing mjxtex math runoff in docs page.

* docs: update logo.

Author: coreyneskey