<DA-204> rename file
<DA-204> Merge branch 'unstable' into DA-204
<DA-204> refactoring. explicit parameter
<DA-204> fix str arr creation
<DA-204> refactoring. change names
<DA-204> change db schema name. give more informative name
<DA-204> set difines for debug mode
<DA-204> move media file specific code from base storage to mediafile storage
<DA-204> fix method. should check delete badge feature
<DA-204> remove mediaFilesService. move code to challenge service, because mediaFiles relative to challenge
<DA-204> remove incorect setter
<DA-204> fix url replaces
<DA-204> refactor urls replacement
<DA-204> remove empty setter for challengeInfo.
<DA-204> replace service locator pattern(anti pattern) with dependency injection pattern
<DA-204> Show download button for all challenges
<DA-204> fix flag logic
<DA-204> refactor download method
<DA-204> Add class for monitoring downloaded mediaFiles
<DA-204> refactoring.