bumped kotlin version to 1.1.3-2, bumped rxjava2 to 2.1.2, robolectric to 3.4.2, gradle android tools to 2.3.3
bumped kotlin version to 1.1.3-2, bumped rxjava2 to 2.1.2, robolectric to 3.4.2, gradle android tools to 2.3.3

pwittchen/ReactiveNetwork,pwittchen/ReactiveNetwork,pwittchen/ReactiveNetwork