Update adb.js: fix typo error

line 511

this.getDeviceWithRetry(120000, cb);
changed to
this.getDevicesWithRetry(120000, cb);
Merge pull request #1546 from jlipps/master

go ahead and kill sims before launching a new one
Merge pull request #1547 from fbai/patch-1

Update adb.js: fix typo error
Update appium doctor for OS 10.8
Merge pull request #1550 from Astro03/master

Update appium doctor for OS 10.8
Adding the ability to run appium-doctor via the app using socket.io
Merge pull request #1559 from penguinho/doctor-gui

Adding the ability to run appium-doctor via the app using socket.io
Adding checks to see if authorize iOS needs to be run
Merge pull request #1560 from penguinho/doctor

Adding checks to see if authorize iOS needs to be run