Update Gradle wrapper version
Make Gradle wrapper executable
Remove 30c3 flavor
Merge pull request #76 from cketti/31c3_only

Remove 30C3 Gradle flavor
Use designtime layout attributes.
Expand alarm list item to left and right border.

+ Update padding, re-use padding definition across different layouts:
  + alarms.xml refers to values/dimens.xml = 16dp, 16dp before
  + alarms_land_large.xml refers to values/dimens.xml = 32dp, 64dp before
  + alarms_large.xml refers to values/dimens.xml = 64dp, 48dp before
Remove redundant layout files used for alarm list.