Android only :  Add a capability to bring up an Android app, without stopping the process,if it is already running
Added server capability stopAppOnReset
Added capability to selendroid
Added help for stopAppOnReset
Add sendKeyStrategy to cap handler
Update caps.md
Merge pull request #4249 from imurchie/isaac-keyboard-caps

Add sendKeyStrategy to cap handler
Merge pull request #4224 from sangeethasriniv/master

Add new capability stopAppOnReset for android
Add waitForAppScript to ios caps handler

waitForAppScript logic was added in #4191, but the caps handler doesn't
know about it, so it never gets executed. Analogous to #4249 for
sendKeyStrategy cap.