Fixes #1007

* Add font family support on bottom tabs

* import missing classes

* import missing class

* update document

* Support customize icon for left nav button in android

* Add navBar navBarTextFontSize support for android

* Add missing parameter instruction for in app notification

* Merge changes as origin master

Ability to set a flat border under the TopBar. `topBarElevationShadowEnabled` should be set to true if using this feature.

* testing

* test

* try fix props on topTabs

* Test xml menu

* Add titleBarHeight

* Remove test

* Add to StyleParams

* Add topTabsHeight

* Fix styleParams type

* Add navBarFontBold

* Add typeface package

* Remove unused debugging

* add adjust soft input optional config for Lightbox on android platform

* Add doc about adjustSoftInput for showLightBox

* Add initialTabIndex support to RCCTabBarController

* Add initialTabIndex support to BottomTabsLayout

closes #1694

fixes #1675

To match the rest of the styling

As the screen api document mentions that it can be done statically, it's best to mention it here as well.

* Revert "Add custom bar button item class (#1641)"

This reverts commit 80ae102456.

* Revert "Export `Navigator` class for public use (#1647)"

This reverts commit 1770113321.

* Revert "Hide back button when calling resetTo (#1469)"

This reverts commit 518e372e05.

* Revert "Add isRootLaunched implementation on Android"

This reverts commit 6f4aca32a6.

* Revert "Fixed LightBox not updating overlay width/height on rotate (#1461)"

This reverts commit 54d2531720.

This allows for custom React Native views to be rendered as a bar button item in the navigation bar.

* Make Navigator Public

* Make Screen.js export both Screen and Navigator

* Update Navigation.js to import Screen correctly

* Make Navigator public for Android too

* Forgot to export after importing

* ESLint fix

* ESLint fix

* ESLint Fix

* ESLint Fix

returns true if NavigationActivity is resumed (startApp was called)

* Fixed LightBox not updating overlay width/height on rotate

* Cleaned up bounds

* Removed unneeded call

See https://github.com/wix/react-native-navigation/issues/1446#issuecomment-319858633

Fixes #1609

* update docs for ios drawer animations in top-level-api section

* update docs for ios drawer animations in top-level-api section

https://github.com/wix/react-native-navigation/issues/1446