Merge pull request #841 from drpy/master

Make Android.prototype.getScreenshot work under Windows
Fix null device id

java -classpath "/android-sdk-macosx/tools/lib/ddmlib.jar:/android-sdk-macosx/tools/lib/x86_64/swt.jar:/appium/drpy/app/android/ScreenShooter.jar" io.appium.android.screenshooter.ScreenShooter null "/var/folders/wy/1786rjcd25x358xsx14h2cjr0000gn/T/appium11361-15943-imqm46.png"
Use lower case adb.
create ChromeAndroid device which subclasses Android
Use === not ==
move remote execute functionality into device common
send commands to chrome as javascript atoms via remote debugger
make chrome device proxy to chromedriver instead of using atoms
add describeForChrome in driverBlock and add webview tests for chrome
fix outstanding issue in doRequest so there's no empty body, misc cleanup
use streams instead of data events for chromedriver subproc
add comment about why we're doing dumb things with chromedriver
add docs for mobile safari and mobile chrome
update grunt docs
remove unused remote debugger files
clean up callback structure
Merge pull request #843 from bootstraponline/adb

Use lower case adb.
Merge pull request #833 from jlipps/chrome

Chrome automation support for Android