Update build tools to 19.1.0 in the Travis cfg
Update build tools to 19.1 in the Travis cfg

Apparently, the version number is (maybe) 19.1 according to http://dl-ssl.google.com/android/repository/repository-8.xml (and not 19.1.0 as expected).
 • Provided AbstractSorter that will be extended by all sorter classes
 • Added constructor for AwardSorter in favour of static method calls
Merge pull request #128 from ninetwozero/update-build-tools-travis

Update build tools to 19.1.0 in the Travis cfg
Merge branch 'dev' into award-sorting
Merge branch 'award-sorting-suggestion' into award-sorting
 • Renamed By category to Select category
 • Moved By progress above Select category
 • Added setActionBarSubTitle to BaseFragment
 • Updating action bar subtitle on menus selections