Merge pull request #11 from ChrisBoesch/master

update 19/06
Merge pull request #12 from ChrisBoesch/master

update changes
Merge pull request #13 from ChrisBoesch/master

update 24/06
Merge pull request #14 from ChrisBoesch/master

update 26/06
Added ready to practice button

- edited #loginalert popup
Merge pull request #15 from ChrisBoesch/master

update 03/07
Merge pull request #16 from ChrisBoesch/master

update 04/07
Ranking & Challenges Update

1. Load open challenges
2. Load challenges user created
3. Ranking : clicking of user to pop-up user profile
4. Ranking : click country flag to display ranking for the selected path
Merge pull request #17 from ChrisBoesch/master

Update 10/07
Merge branch 'master' of https://github.com/ChrisBoesch/kat-gui