* Switched yaml.load to yaml.safe_load to prevent code execution via crafted yaml files
Python's yaml.laod can lead to code execution via crafted yaml files such as:
```
code_exec: !!python/object/apply:subprocess.check_output ['ls']
```
* Fixed XSS via bleach
It was possible to get an XSS via the markdown library via simply setting a description containing arbitary HTML tags.
It was also possible to create links that went to the `javascript:` link handler (eg `[example](javascript:alert(0)`)
Using bleach to sanitize it solves both of these.
* Added XFO header by default to prevent clickjacking attacks
Note that with this application clickjacking can be relatively severe via the SQLLab functionality
which allows executing arbitary SQL.
* Added justification for dangerouslySetInnerHTML
* Fixed linting errors
* Fixed linting errors
* Adding full Annotation Framework
* Viz types
* Re organizing native annotations
* liniting
* Bug fix
* Handle no data
* Cleanup
* Refactor slice form_data to data
