Change USA flag to UK and minor translation fixes

Add an overview of the app

Change revision to match last changes

Merge branch 'master' of github.com:At3flo/swiss-hockey-tool

Merge pull request #43 from At3flo/dev

- Added a basic filter when document is ready and DB request shrink to 4 previous week
- Fixed possibility to create events in name of other clubs
- Disabled the ability to register new teams when tournament state is closed

Merge pull request #38 from At3flo/dev

Category filter and small fixes

Added the ability for admin to receive new user notification

Dev

Merge pull request #33 from At3flo/dev

- Fixed lodash vulnerability

Merge pull request #28 from At3flo/dev

Defined all basic meta with OG and Twitter also

Merge pull request #26 from At3flo/dev

- Added popovers (color markers) to display places availability on Home Page
- Fixed a stronger number of digits for user passwords