Merge pull request #8 from GeographicaGS/dev_raul

Some fixes
Merge pull request #9 from GeographicaGS/dev_raul

Some fixes
Merge pull request #10 from GeographicaGS/dev_raul

Dev raul
Merge pull request #11 from GeographicaGS/dev_raul

Restored course custom backgrounds
Merge pull request #13 from GeographicaGS/dev_raul

Dev raul
Merge branch 'dev_raul'
Change user sign in flow