Minor changes in MaiMenuActivity (view venue menu intenting user to
CategoriesMealActivity).
ReceiptList implemented check if server response is != null, and lenght
of receipt array > 0.
Merge branch 'master' of https://github.com/s7droid/Menu.git
Merge branch 'master' of https://github.com/s7droid/Menu.git
Code refactoring