feat (TabBar) remove the need of image selector to specify the tabIcon
Merge pull request #126 from pentateu/topic/adjust_tab_bar_pixate_selectors

Implement these Pixate selectors
feat (Tests) add test case for layers and modals being pushed form background web views
Use green background color for loading.html to distinguish between black blinking
Use same nav bar bg color which ios uses
Merge pull request #127 from pentateu/topic/push_layer_modals_from_preloaded

feat (Tests) add test case for layers and modals being pushed form backg...
tests for updating only one nav bar button
fix (Modal tests) add id to the preloaded web view
Merge pull request #128 from pentateu/topic/fix_modal_test_case

testShowPreloadedOnce shows two modals on Android
window.postMessage in layers.push test
test for set button with styling from generic nav-bar button selector
add id to a preload+postmessage test to make it work better