add target to download and install adb
ignore platform-specific ADB binaries
remove adb binary for Mac from source control
remove binary for Linux from source control
support adb on Windows
Merge pull request #338 from mykmelez/adb

adb on all three platforms
FIX: adb executable uri is "data/linux64" on XPCOMABI x86_64
Merge pull request #339 from rpl/fix-adb-linux64-path

FIX: adb executable uri is "data/linux64" on XPCOMABI x86_64
add geolocation mock data support Issue #332