Add changelog for 0.3.2

[welcoMattic]

Ref #95

[Nyholm]

Thank you. Would you mind adding the rest of the changelog as well?

### Changed

- HTML fixes on profiler page

### Added

- Option to not show "unstraslatable" in WebUI
- Make sure we fail with an exception if SfTranslation is not enabled
- Improved testing

### Fixed

- Added translation cache dir on warmup

[welcoMattic]

Done 👍

[Nyholm]

Thank you. I'll just wait for traivs.

[welcoMattic]

I just add a little comment in README to precise where load symfony_profiler param. I was load it in config.yml, but I experience some issues during cache:clear on prod env.

symfony_profiler must be enabled only on dev env

[Nyholm]

Thank you

[rvanlaak]

👍