'android' command is 'android.bat' on Windows.
Merge pull request #1109 from paymand/android_command

'android' command is 'android.bat' on Windows.
Merge pull request #1108 from jlipps/master

add a yiewd example and preliminary ios 7 support
make sure displayed() returns bool and attribute() returns string
fix tests for use of api level 18 emulator
fix race condition in local screenshot
partially address #1082?